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CUSTOMER PRESENTATION ABSTRACTS

PLAN YOUR TIME EFFECTIVELY USING OUR COMPREHENSIVE GUIDE TO SIMULIA ACTIVITIES!

YOUR ESSENTIAL GUIDE TO

MARRIOT COPLEY PLACE, BOSTON TRAINING DAY: MAY 26

WWW.3DS.COM/EVENTS/SCIENCE-IN-THE-AGE-OF-EXPERIENCE

Science in the Age of Experience is the next generation in a long line of annual SIMULIA customer conferences extending back nearly three decades allowing SIMULIA users from across the globe to join together to exchange valuable industry knowledge and experiences. Join us in Boston to see how Science in the Age of Experience is driving the future of simulation.

This new event will connect with other leading Dassault Systèmes brands to provide more content, visibility and value to our users. It will be the biggest technical event Dassault Systèmes has ever hosted.

Science in the Age of Experience will contain an expanded thought-leadership program on Monday afternoon that focuses on the expanding role of science, modeling and simulation to power innovation, solve important problems in products, nature and life, and provide even more value to our customers and to society.

However, attendees will still see all of the traditional SIMULIA Community Conference features that they love and more! Don’t miss out on your chance to:

• Attend more than 80 customer presentations in your favorite industries, including Transportation & Mobility, Aerospace & Defense, Hi-Tech, Life Sciences and more

• Choose from 10 Technology Updates

• Attend our expanded Training Day with a choice of seven courses to choose from

• Visit the hands-on demonstrations in the expanded Experience Playground, as well as see what our partner solutions have to offer

• Meet R&D experts from SIMULIA and BIOVIA

We understand it is increasingly difficult to justify time out of the office to attend conferences, trade shows and seminars. Previously, events such as these were the only way to find out about a new product or advance in a specific subject area. However, today, with so much information available via the web, this justification is rarely valid especially in cases requiring international travel. With this in mind, we have assembled this user e-Book to convey some of the wider benefits you will receive by attending Science in the Age of Experience.

This e-Book features key information for our SIMULIA users about Science in the Age of Experience. We hope you use it to prepare for this year’s exciting event, and we look forward to welcoming you in Boston!

JOIN US FOR SCIENCE IN THE AGE OF EXPERIENCE

WELCOME LETTER

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CONTENTSIMULIA Agenda 4

Enhance Your Knowledge with the SIMULIA Training Day 5

SIMULIA Senior Management 7

SIMULIA Presentations 8

SIMULIA Customer Presentations 9

SIMULIA Meet the Experts 15

SIMULIA Usability Testing 16

Early-bird Hands-on 16

Support Desk 16

Explore the SIMULIA Eco-System 17

SIMULIA Conference Exhibition 19

Venue and Accommodation 21

Conference Registration 21

SIMULIA Customer Presentation Abstracts 22

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SIMULIA AGENDA

MONDAY, MAY 23 TUESDAY, MAY 24

Morning Technology Updates Track Sessions

Late Morning Technology Updates Track Sessions

Noon Lunch Lunch

Afternoon Open Plenary Tracks and Technology Updates

Late Afternoon Open Plenary Plenary

Evening Partner reception SIMULIA Gala

WEDNESDAY, MAY 25 THURSDAY, MAY 26

Morning Plenary Training Day

Late Morning Tracks and Meet the Experts Training Day

Noon Lunch Lunch

AfternoonTracks and Technology

UpdatesTraining Day

Late Afternoon Track Sessions Training Day

Evening Free time

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MONDAY, MAY 23 TUESDAY, MAY 24

Morning Technology Updates Track Sessions

Late Morning Technology Updates Track Sessions

Noon Lunch Lunch

Afternoon Open Plenary Tracks and Technology Updates

Late Afternoon Open Plenary Plenary

Evening Partner reception SIMULIA Gala

Enhance Your Knowledge with SIMULIA Training DayOn Thursday May 26, we will present the SIMULIA Training Day. This day was historically known as the Advanced Seminar day. We have revamped and expanded the day with more technical courses and seminars.

Technology Seminars

Strategies and Tools for Material Model CalibrationThe key to success with FEA simulation is correlation to the real-world behavior of physical behavior and products. Lack of physical correlation is often directly related to the lack of accuracy in the material model. This class will give you extra tools to assess the material models that you are currently using and showcase new material models in Abaqus that might better capture the physics important to your component and its loading environment. We will cover advanced material modeling for metals, elastomers, polymers and engineering plastics. Attendees will come away with a thorough understanding of best practices that they can immediately apply in their projects to improve accuracy and performance. This seminar—back by popular demand—is an updated version of the seminar offered at the 2015 SIMULIA Community Conference.

Best practices for Contact Modeling for Accuracy and Accelerated ConvergenceThis course covers current perspectives from SIMULIA R&D on best practices for contact modeling, recent contact enhancements, diagnosing issues,

understanding approximations, making informed modeling decisions, and getting reliable results. This seminar will not focus on teaching user interface details. This seminar is geared toward helping those with Abaqus contact modeling experience obtain a next level of understanding and success, especially for implicit contact analyses. Additional likely topics include development trends and approaches to common yet challenging modeling scenarios brought forward by attendees. The seminar will focus on the established Abaqus product line as well as the new technology for linear and CAD-enhanced contact supported by the 3DEXPERIENCE™ portfolio, plus other enhancements and new workflows resulting from those enhancements.

Multibody Simulation using Simpack for Abaqus UsersSimpack is a general purpose Multibody Simulation (MBS) software product used for the dynamic analysis of any mechanical or mechatronic system. It enables engineers to generate and solve virtual 3D models in order to predict and visualize motion, coupling forces and stresses. This course will focus on providing an introduction to the technology in Simpack and educating existing Abaqus and Simpack users as to possible applications in their company. Attendees will also discover how Simpack interoperates with Abaqus. This course is focused on the technology in, and usage of, Simpack for the traditional SIMULIA user. Attendees will come away from the course with a firm understanding of the technology and applicability of Simpack and the value of Multibody Simulation as an application area together with FEA.

SIMULIA TRAINING DAY

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Hands-on Training Courses These two Hands-on Training Courses offer attendees a unique opportunity to gain hands-on training while attending Science in the Age of Experience. Attendees will do workshop problems on their own Windows laptops overseen by experienced instructors from SIMULIA. (Attendees will receive instructions before the event to pre-load the Abaqus Student Edition on their laptops before coming to the conference. This edition will be theirs to keep after the conference.)

Hands-on with Submodeling: Techniques for Increasing Simulation AccuracyThe ever increasing size and complexity of modern designs pose challenges to today’s analyst as conventional modeling approaches are ill-suited to simulate and validate them effectively. Submodeling offers an attractive alternative because it allows the analyst to run a series of simulations, zooming in on regions of interest in a global model, to extract more accurate results. This course aims to provide users with an understanding of the submodeling method and illustrate its usage through examples. The course covers the following topics: When submodeling can be useful, how to properly construct a coarse, global analysis that can "drive" the submodel analysis, how to design the mesh for the submodel analysis, when to use solid-to-solid, shell-to-shell and shell-to-solid submodeling, and submodeling in nonstructural problems. Although the course content is a subset of the standard Substructures and Submodeling with Abaqus course, attendees will receive the full set of lecture notes from the standard course. In addition, attendees will also receive a copy of Abaqus Student Edition. They will need to download and install Abaqus Student Edition on their personal laptops prior to the class in order to participate in the workshop exercises.

Hands-on with Composites Simulation: Effective Modeling of Composite Materials with AbaqusComposite materials are used in many industries, across a range of design applications, because of their high stiffness-to-weight ratios and the ability to tailor their response as needed. This course aims to introduce users to the capabilities in Abaqus enabling effective modeling of composite materials. The course covers the following topics: Using detailed modeling of the microscopic behavior to determine the behavior of composite materials, defining anisotropic elasticity with Hookean models for combining the fiber-matrix response, defining composite layups using Abaqus/CAE, achieving the correct material orientation of the layers of composite shells and solid elements, as well as recent enhancements in the technical capability. Although the course content is a subset of the standard Analysis of Composite Materials with Abaqus course, attendees will

TRAINING DAY

receive the full set of lecture notes from the standard course. In addition, attendees will also receive a copy of Abaqus Student Edition. They will need to download and install Abaqus Student Edition on their personal laptops prior to the class in order to participate in the workshop exercises.

Application SeminarsIntroduction to 3DEXPERIENCE Simulation for Abaqus UsersThis course will provide the existing Abaqus user with an in-depth introduction to the concepts, usage, functionality, and capabilities of the 3DEXPERIENCE Simulation portfolio of apps and Roles. The course will show new capabilities in the 3DEXPERIENCE Simulation portfolio for model assembly, batch meshing, visualization, and model re-use. Focus will be on conceptual level understanding with some detailed workflows to highlight the concepts. The attendee will come away from the course with a better understanding of the scope, content, usability, and functional content of 3DEXPERIENCE Simulation.

Encounter the Power of the SIMULIA Portfolio: fe-safe, Tosca, Isight, and Abaqus in ActionThrough Extended Packaging, all Abaqus users now have access to more technology than ever. This course will illustrate the practical benefits and usage of fe-safe, Tosca, and Isight along with Abaqus to extend the attendee’s simulation skillset to include durability analysis and optimization techniques. The course will focus on industrial applications combining Abaqus, Tosca, fe-safe, and Isight to increase the value added through simulation and will provide compact introductions to: structural optimization with Tosca using Abaqus/CAE, fatigue analysis with fe-safe, and process automation and parametric optimization with Isight. The course will expand attendee’s simulation knowledge by teaching how to simulate fatigue behavior and likely failure modes. Participants will also learn how to apply topology, shape, and parametric optimization to boost quality, durability and performance while reducing development time.

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SIMULIA SENIOR MANAGEMENT

Alan Prior Vice President, Worldwide Center of Excellence, SIMULIA

Gain Insight into SIMULIA’s StrategyScience in the Age of Experience is attended by all the SIMULIA Senior Management. Our senior managers can offer a unique perspective on the position and direction of the SIMULIA brand. Senior Management at Science in the Age of Experience includes:

Scott Berkey Chief Executive Officer, SIMULIA

Roger KeeneVice President, SIMPACK, Multibody Simulation and Global Operations

Colin Mercer SIMULIA R&D Strategy, Vice President Member of Brands R&D

Sumanth Kumar Vice President SIMULIA Growth

Dimple ShahVice President, SIMULIA World Wide Sales

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Learn About the Latest TechnologyOur SIMULIA experts will present a series of lectures throughout the conference. These lectures are meant to equip, as well as, empower you to innovate.

Technology for Science in the Age of Experience Delivered by Bruce Englemann, SIMULIA CTO, and Reza Sadhegi, BIOVIA CSOThis energizing presentation by Bruce and Reza will link the long-term visions and aspirations previously presented at the conference by Bernard Charlès, Pascal Daloz, and Martin Karplus with the Dassault Systèmes technology strategy for SIMULIA and BIOVIA. Today’s practice—the breadth and depth of what is possible now—as well as the next-three-year’s potential of work already in the pipeline will be highlighted by an interactive demo showcasing a number of applications that are in-scope today that you most likely haven’t thought about. The presentation promises to be rich in technical detail as the “bridge” between nano-scale, everyday-scale, and city-scale is highlighted showing the obvious link between SIMULIA and BIOVIA from Molecules to Materials and Materials to Metropolis.

Accelerating Innovation with the 3DEXPERIENCE PlatformThis lecture continues the successful General Lecture 2 presented last year in Berlin at the SIMULIA Community Conference. The theme is to highlight the evolution of simulation “from solve to innovate”. The session will demonstrate how the 3DEXPERIENCE platform provides solutions to accelerate innovation by providing a platform for analysts to execute simulation tasks in a new, more powerful and more efficient way. Highlighted functionality will be the ability to capture and execute end-to-end simulation processes. Key aspects include the capability to relate the results back to design requirements and the ability to respond rapidly to design changes. The session will also show how the 3DEXPERIENCE platform enables users to leverage more from simulation when their work is captured, shared, and re-used by themselves and others.

New Applications and New Technology in the Power of the Portfolio This presentation focuses on technology, solving, model-building, and applications of our traditional products including Abaqus, fe-safe, Tosca, and Isight. When these products are used together, simulation values expand rapidly beyond simply building and solving FEA models to include lifecycle prediction, shape and parameter optimization, and design space exploration. The content of the lecture will be delivered by means of a set of new applications that illustrate the leverage that the SIMULIA technology can bring to all users. The lecture will show both why and how it can be done.

SIMULIA PRESENTATIONS

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SIMULIA CUSTOMER PRESENTATIONS

Customer PresentationsIt is clear that the sharing of user experiences is the centerpiece of the Science in the Age of Experience. These presentations provide first-hand knowledge of deploying SIMULIA solutions and developing workflows for real-world realistic simulation. These presentations usually contain additional detail such as videos and animations not available in the published papers. More importantly, the live presentations enrich the papers by providing unique user-specific viewpoints.

Due to the overwhelming response to our call for papers promotion, the technical tracks were oversubscribed. So the conference offers a very full agenda of 80 user presentations in 10 parallel sessions.

Also new this year, the length of our user presentation sessions has been extended from 30 to 45 minutes allowing a more thorough and in-depth presentation of the user’s work and material. We believe attendees will appreciate the more relaxed pace and additional details provided for each topic in this format.

Attending the conference also provides you with the opportunity to ask questions at the end of each presentation to clarify specific points and to meet the presenters in the networking sessions for more detailed discussion of ideas.

See below for list of SIMULIA customer presentation titles to be presented during the conference. For more details, including customer abstracts, see page 22.

Aerospace & Defense

Aventec Inc.Weight Optimization of a Landing Gear Steering Collar using Tosca in Abaqus

Beijing FEAonline Engineering Co.,LtdImplementation of a User Specified Ductile Fracture Constitutive Model using Abaqus User Subroutine

Combustion Research and Flow Technology, Inc. (CRAFT Tech)Predictions of Fluid/Structural Interactions using Abaqus Cosimulation and Advanced CFD Solvers

Eaton CorporationCrack Damage Tolerance Assessment and Leak-before-break Flow Simulation

Naval Undersea Warfare CenterModeling of Wave Propagation Through Soft Electrically Tunable Metamaterials

Roketsan Missile Ind.Design and Test of a Canard for a Missile

TEN TECH LLCAbaqus Scalability for Small and Medium Size Problems

University of Zagreb, Faculty of Mechanical Engineering and Naval ArchitectureHigh-velocity Impact Damage Modeling of Laminated Composites using Abaqus/Explicit and Multiscale Methods

Architecture Engineering & Construction

AtomenergoproektApplicability of Modal Dynamic Method in Seismic and Aircraft Crash Analyses of NPP Structures.

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SIMULIA CUSTOMER PRESENTATIONS

National University of SingaporeAnalysis of 3D Steel Concrete Composite Buildings using Abaqus

UberCloudHeavy Duty Structural Analysis using Abaqus in the Cloud

Université Hassan 1 FSTSA non linear model for studying the interface’s behavior bloc/mortar in a heritage building and numerical modeling by Abaqus

University of Tennessee at ChattanoogaFinite Element Thermal Crack Analysis of Prestressed Double Tee Canopy BeamComposites

ATA EngineeringAnalysis Tools for Accelerated Development of Composite Materials

Convergent Manufacturing Technologies, IncSimplifying composites process modelling in Abaqus with COMPRO

DuPont de NemoursA Simulation Approach to Combine Multi-Scale Model Features with Failure at Composites Level for Short Fiber Reinforced Polymer

DuPont Performance MaterialsPrediction of Nonlinear Viscoelastic Recovery of Thermoplastic Polymers using Abaqus Parallel Rheological Framework (PRF) Model

Consumer Goods & Retail

University of Massachusetts LowellMulti-Scale Modelling of Textile Reinforced Tissue Engineered Heart ValvesConsumer Goods & Retail

ASICS corporationThree-dimensional Numerical Foot Model for Running Shoe Designing

llinois Institute of TechnologyEvaluation of Tennis Racket Swing During Impact with a Tennis BallBaseball Bat Swing Analysis using Finite Element MethodsEvaluation of Baseball Bats on Impact with a Baseball During a Bunt Hit

Consumer Packaged Goods & Retail

Kimberly-Clark CorporationLeveraging Low Cost Body Models for Personal Care Virtual Product Evaluation

Grupo SmarttechStrength analysis of thermoplastic containers using numerical simulation

Plastic Technologies, Inc.Virtual Modeling's Role in Improving Impact Performance of Plastic Containers

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SIMULIA CUSTOMER PRESENTATIONS

The Procter & Gamble CompanyThe Journey to Meet P&G's Needs for Democratizing and Managing Simulation via the 3DEXPERIENCE V+R Process Applications

Veryst EngineeringSloshing Analysis of Baffled Containers Using SPH Method

Energy Process & Utilities

Baker HughesFlow Induced Vibration Modeling

Korea Atomic Energy Research InstituteAxial Impact Analysis of Fuel Aseembly FOR PGSFR

Lse Design IncQuality Control of Pipe Lay and Riser Dynamic Analysis

PrincipiaOptimised Design of Foundations for Wind Turbine Towers

Tenaris Dalmine SpANumerical and Experimental Study on the High Strain Rate Deformation of Tubes for Perforating Gun Applications

Eni S.p.A.Implementation of an elasto-viscoplastic constititive law in Abaqus/Standard for an improved characterization of rock materials

HalliburtonEvaluation of Effects of Trapped Fluid on Downhole Tool Deformation

HalliburtonA Simplified 3D Numerical Scheme for Accurate Calculation of Critical Value of Pressure Draw-down of Weak Sand Formation

Fatigue & Durability

Dassault Systemes UK LimitedMetal Fatigue: Failure and Success

Mercedes Benz Research and Development IndiaSimulation of Caulking Process using Abaqus/Explicit

Quest Integrity GroupDuctile Tearing Instability Assessment of a Cracked Reactor Pressure Vessel Nozzle for Larger Critical Crack Size Compared to the FAD Method

Saba Metallurgical and Plant Engineering Services, LLCASME Cyclic Creep Evaluation of Critical Piping Component using CREEP Subroutine and ORNL Test Data

High Tech

BoschPredicting Post-Drop Failure of Ceramic Chip Capacitors using Abaqus/Explicit

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SIMULIA CUSTOMER PRESENTATIONS

DfR SolutionsAutomated Translation of Non-Symmetric BGA Design into Copper-Featured Three-Dimensional Abaqus Models

Digital Product Simulation Inc.Vibrations Reduction and Control System Improvement using Abaqus/Dymola Co-Simulation

GN netcomThe Application of Abaqus in Optimization Design for Headset Metal Shrapnel

Motorola Mobility LLCAutomated framework to predict field failure rate for handheld electronic devicesIndustrial Equipment

AriensAnalytical Frame Design for Commercial ZTR Mowers

CISDI Engineering Co., Ltd.Application of Abaqus-FMI Co-simulation in Metal Casting Press-Forming Process

H.C.StarckCrack Analysis in Molybdenum Glass Melting Electrode

Sogang UniversitySpherical Indentation Cracking in Brittle Materials: An XFEM Study

United Arab Emirates UniversityInvestigation on the Influence of Geometric Parameters of Rectangular Cross-Sections on Buckling of the Structure

Life Sciences

Becton DickinsonThermal - Fluid Co-Simulation of DNA Sequencing Thermocycler

CAPVIDIASimulating Blood Flow in a Living Heart Model

Mechanical Design & Analysis CorporationAnalysis of Clothing Pressure on the Human Body in Motion

Optimal DeviceTopology Optimization of a Lacrosse Head

Purdue UniversityStiffness Mapping in Biological Materials Based on MRI Imaging and Topology Optimization

Saint Louis UniversityA Finite Element Model of the Intervertebral Disc

Unilife Medical SolutionsPredicting and Designing Integrated Safety Syringe for Shelf Life Using Advanced Nonlinear Constitutive Models in Abaqus

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SIMULIA CUSTOMER PRESENTATIONS

Materials

CamsoImproving Rubber Tread Designs Against Heat Build-Up Under Cyclic Loading Using Strain Energy

Cornell UniversityUsing an Intermediate Validation Step to Increase CAE Confidence

DuPont de NemoursModelling of Hytrel® Thermoplastic Elastomer Material for High-Strain Cyclic Loading

Illinois Institute of TechnologyExperimental Co-relation of Vibration Welded Bead's Burst Pressure using Finite Element Techniques

Mechanical Design & Analysis co.A Hyperelastic Visco-elasto-plastic Damage Model for Rubber Materials

Veryst EngineeringCoupled Thermomechanical Forging Simulations and the Effect of Material Constitutive Laws

Natural Resources

Baker HughesMechanisms-Based Fracture Model For Geological Materials

Baker HughesCoupling Reservoir Simulation and Geomechanical Modelling to Improve the Analysis of Hydrocarbon Reservoir Behavior

C-FER TechnologiesFinite Element Analysis of Well Deformation Mechanisms

ExxonMobilMechanics of hydraulic fracturing in ultra-low permeability formations: the role of cavitation and sorption

The University of Texas at AustinModeling Natural Fracture Activation Using a Poro-elastic Fracture Intersection Model

Optimization

3dPLM Software Solutions Ltd.Optimization of sheet metal forming process based on Sobol samplingTransportation & Mobility

BMW AGCoupled Eulerian-Lagrangian contact modeling for airbag deployment simulation

Colorado School of MinesSimulation of glass forming of automotive windshields

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SIMULIA CUSTOMER PRESENTATIONS

Dana Holding CorporationOptimization of Heavy-Duty Cylinder Head Gasket Manufacturing Press Using Isight

FCA Engineering India Pvt LtdPrediction of Aluminum Wheel Distortion under Pothole Impact

General MotorsCylinder Head Valve Guide Wear Analysis of Internal Combustion Engine

Hyundai Motor CompanyIntegration for installation Upper Body of the European semi-bonnet Truck

Hyundai Motor CompanyVirtual vehicle evaluation using Abaqus / FTire co-simulation

Illinois Institute of TechnologyEvaluation of Brain Stresses during Car Crashes using the SAE Baja Racecar Test Vehicle

Missouri University of Science and Tech, Rolla, MOFEA Prediction of Off-Road Tire Temperature Distribution

Technische Universität München - Fachgebiet Computational MechanicsModel Order Reduction Methods for Explicit FEM

Volpe National Transportation Systems CenterBond Model Development for Pretensioned Concrete Crossties with User Materials in AbaqusFor more details, including customer abstracts see page 22.

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SIMULIA Meet the ExpertsThese sessions are constructed to facilitate and encourage direct one-to-one interaction between attendees and the SIMULIA team on technical topics of great interest. At the Meet the Experts sessions, attendees can gather and meet directly with technology leaders within SIMULIA to ask questions, make suggestions, ask for help, exchange business cards, and engage with the teams that are directly responsible for putting the power in the SIMULIA portfolio. We expect lively, engaging rapid fire sessions where attendees will learn not only from asking their own questions, but from listening to the questions and answers from others. Emphasis will be placed on answering as many questions as possible, so have your questions ready and come prepared! Attendees are free to float from one topic to another within these sessions.

This year’s Meet the Experts topics (subject to change) are:

• Simulation Driven Design (Tosca technology)

• Additive Manufacturing

• Fatigue & Durability ( fe-safe)

• Abaqus/CAE & Modeling techniques

• Abaqus/Explicit

à Performance

à Contact

à Materials Modeling

• Abaqus/Standard

à Linear Dynamics, Vibration Response, NVH

à Fracture Mechanics

à Contact Modeling

à Materials Modeling

à Performance

• Multibody Simulation (Simpack and Abaqus)

• Process Automation & Design Exploration

à 3DEXPERIENCE SPDM with Isight Technology

• CFD on 3DEXPERIENCE platform

• Plastics on 3DEXPERIENCE platform

• Structures on 3DEXPERIENCE platform

• Benefits of 3DEXPERIENCE platform

à Meshing & Modeling

à Visualization

à Co-Simulation & Openness

à Democratization of Simulation

SIMULIA Technology Updates Science in the Age of Experience will present 10 Technology Update presentations in parallel. The material will be repeated four times during the conference allowing attendees to attend four of the 10 topics live at the event. All of the presentation material will be available to all attendees on the SIMULIA Learning Community after the event.

The 10 Technology Updates (subject to change) to be presented in Boston are:

• Simulation Driven Design

• Additive Manufacturing

• Fatigue, Fracture & Durability (Abaqus & fe-safe)

• Abaqus Solvers (/Standard & /Explicit)

• CFD on the 3DEXPERIENCE platform

• Multibody Simulation (Simpack and Abaqus)

• Plastics on the 3DEXPERIENCE platform

• Structures on the 3DEXPERIENCE platform

• Process Automation & Design Exploration

• Benefits of the 3DEXPERIENCE platform

SIMULIA MEET THE EXPERTS, SIMULIA TECHNOLOGY UPDATES

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Usability Testing Help us develop and participate in Usability Studies at Science in the Age of Experience with trained usability researchers and complete typical tasks in various parts of our software. Help us understand how easy or difficult it is to learn new or enhanced aspects of our software. Give us your feedback on everything you see and do!

What is it?Usability studies put a participant – you – in front of in-development software to complete a number of tasks, thus allowing our developers to get the feedback they need as improvements and enhancements are added to our software.

Why do this?Participating in a usability study lets you, the customer, give feedback before the release of software. It makes you a partner in our development effort.

Interested in helping? Sessions start on Tuesday, May 24th, and run throughout the conference. Contact the Usability Research team to schedule a session during the conference.

Please let us know if you are interested in participating in Usability Studies by completing this brief survey: http://simulia.questionpro.com.

Early-bird Hands-onTuesday and Wednesday Begins 60 minutes prior to the conferenceOccurring for one hour before the conference opens on Tuesday and Wednesday, the Early-Bird Hands-on sessions provide an opportunity for interested attendees to come and explore the processes, functionality, user interfaces, and scope of the 3DEXPERIENCE platform, the platform that provides the basis for a radically expanded visibility, value, and role of the analyst within his or her company. Based on Abaqus technology, the simulation processes within the 3DEXPERIENCE platform provide you with an unparalleled opportunity to amplify the importance of your simulation work in your enterprise. But don’t take our word for it, come and see for yourself! Take advantage of this unique opportunity to test drive the software whilst being guided by experienced hands from our field support team.

Life Sciences Special Interest Group Attendees are invited to attend a Life Sciences Special Interest Group (SIG) meeting, taking place on Thursday May 26, 2016 in Boston alongside Science in the Age of Experience. This event provides a forum for attendees to meet and conduct closer dialog with key Life Science stakeholders from SIMULIA (including the Virtual Human Modeling team) and Dassault Systèmes as a whole to help further the use of modeling and simulation in Life Sciences. The SIG activities will begin at 8:00 AM with breakfast and conclude at 1:00 PM with discussions over lunch.

Academic PostersOur 2016 Academic Poster Showcase includes posters from around the globe covering a variety of research and teaching endeavors. They represent a cross section of the many important industries we support with our SIMULIA products. We look forward to sharing them with you in Boston!

Support Desk Open during breaks, lunch and technical paper sessions. Customer Support and Application Engineers will be available for one-on-one help and advice with your current simulation models at the Support Desk. Get more specific information about your current simulation tasks or ask about best-practices and get the advice of our experienced support team for how to start a future activity. You are welcome to bring in your models and files on a memory stick, if needed, for help on model-specific issues. No appointment necessary!

The SCC 2014 Favorite Poster submitted by Cynthia Mitchell, University of Massachusetts-Lowell, USA

USABILITY TESTING, EARLY-BIRD, SUPPORT DESK

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Explore the SIMULIA Eco-SystemJoin our Partner Integrated Solutions "Hands on Demos" A selection of SIMULIA Alliance Partners will provide a 20 minute hands-on demonstration session at Science in the Age of Experience. The demonstration will show how their software integrates with SIMULIA software to create a complete, seamless solution.

BETA CAE Systems SA The demonstration by BETA CAE Systems S.A., will highlight the last part of the presentation which is related to the reporting capabilities of META post-processor for creating and exporting .pptx and .xlsx files, as well as saving model data, results of interest and the reports within a single file. This file, called a META Project is binary and can be encrypted and compressed. It can be opened by META and META-Viewer, a licence-free and reduced functionality version of META that can be installed as a standalone software or a plugin in MS-PowerPoint and web browsers.

Capvidia The demonstration will show the 2-Way Strongly Coupled FSI between Abaqus & FlowVision including:

• Automatic Re-Meshing (Not Limited to MeshDeformation)

• Coupling: Natural Data Exchange between CFD and FEMeshes (No Intermediate Mesh like MPccI)

• Multiphysics Manager: (Re)Starting Co-Simulation &Real-Time Results Monitoring

• Completely Independent (Implicit/Explicit) IntegrationSteps

• Data Exchange at User-Defined Number of Time Steps

CST This demonstration will provide attendees an insight into CST’s electromagnetic field simulator CST STUDIO SUITETM and show an example of the interaction between electromagnetic fields and the human body. We will discuss the challenges of harmonizing product performance and safety, as well as the importance of multi-disciplinary co-design to optimize electromagnetic and structural design goals.

DfR Solutions The software demonstration is intended to showcase the speed and ease of getting a reliability prediction of a circuit card using Abaqus/CAE and Sherlock. We will take the output files from an ECAD software and create a full 3D model that is ready to run Abaqus in less than 5 minutes. We will then run a mechanical vibration analysis and create a prediction for the time to failure of components on the board.

Endurica Learn how to use fe-safe/Rubber’s™ elastomer material models and Critical Plane Analysis algorithm to simulate and diagnose the fatigue failure process in a CV boot.

Critical Plane Analysis of Elastomeric CV Boot Durability: The analysis of elastomer fatigue performance under real-world loading conditions has never been easier or more accurate. Come learn how to use fe-safe/Rubber’s elastomer material models and Critical Plane Analysis algorithm to simulate and diagnose the fatigue failure process in a CV boot.

Granta DesignThe demonstration will show how analysts can assign material models from their corporate material database to their CAE models in a seamless, traceable way via GRANTA MI:Materials Gateway.

GRANTA MI is the leading materials information management system. Typically hosted on the corporate network, it can be accessed via an embedded application within Abaqus/CAE.

This MI:Materials Gateway application enables users to find material CAE models from within their approved corporate materials database. Material models can be found through text and/or property searches. These can then be imported into their CAE models.

The imported CAE material models include metadata which enables MI:Materials Gateway to inform users of updates or additional models.

SIMULIA ECO-SYSTEM

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Psylotech Psylotech will demonstrate Visca™. Polymer properties change with time, temperature and loading history. Polymers also heat during cyclic loading. Psylotech's Visca is an easy-to-implement, nonlinear viscoelastic Abaqus add-on module. The demonstration will highlight Visca's strain rate and temperature dependence capabilities, and also its self-generated heat during cyclic loading on plastic and rubber.

Quest Integrity The FEACrack demonstration will examine surface crack meshes in two examples: a cylinder with an axial seam weld, and a user-defined geometry using tied contact. The mesh options will be used to quickly generate crack meshes for Abaqus analysis, and the post processing module will obtain crack front result values.

Software Cradle SC/Tetra is general purpose Computational Fluid Dynamics (CFD) software.

It is a finite volume solver based on unstructured mesh. SC/Tetra can couple with Abaqus using the Co-Simulation Engine (CSE) to solve Fluid Structure Interaction (FSI) problems. In this demo we will briefly go over the necessary steps to complete the setup in CFD and show users how to run FSI simulations using SC/Tetra and Abaqus.

Transvalor Z-mat is a fully integrated product which provides Abaqus users a large base of constitutive models for plasticity and viscoplasticity, along with dedicated robust integration methods and advanced material parameter identification procedures.

Wolf Star TechnologiesThis workshop will recover the loading in an SAE Baja car suspension linkage using True-Load™ software. The car was designed and built by students at UW-Milwaukee. The participants will start with an FEA model and create loading time histories which create measured strain correlation within 5% on all channels.

SIMULIA ECO-SYSTEM

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Discover Complementary Technology Partner Sponsors are a significant asset to our conference offering innovative complementary solutions that will help you streamline your overall engineering process. Learn more about select product offerings during the Integrated Solutions sessions.

SIMULIA is pleased to recognize our partners participating in Science in the Age of Experience:

BETA CAE SystemsBETA CAE Systems S.A., is an engineering software company committed to the development of state of the art CAE software systems that meet the requirements of all simulation disciplines. The company’s flagship product, the ANSA / μETA pre- & post-processing suite, holds a worldwide leading position, across a range of industries.

Brochure: http://www.simulia.com/alliances/ebook/BETA_CAE_Brochure.pdf

Webinar: http://www.simulia.com/alliances/ebook/BETA_CAE_Webinar-ToscaANSA_Environment.mp4

Concepts NRECConcepts NREC’s Agile Engineering Design System® is a complementary software suite for Computer-Aided Engineering (CAE) and Computer-Aided Manufacturing (CAM) used to design and manufacture turbomachinery parts. Our CAE software spans preliminary sizing through full 3D CFD and FEA stress and vibration analysis. Optimized designs can be easily imported into our industry-leading CAM software.

Brochure: http://www.conceptsnrec.com/ConceptsNREC/media/Data-Sheets/Corporate/CN_Overview.pdf

Webinar: http://www.simulia.com/alliances/ebook/Concepts_NREC_IsightDemo2015_eBook_3.mp4

Cradle North AmericaSoftware Cradle is a leading provider of Computational Fluid Dynamics (CFD) software including SC/Tetra (general purpose unstructured mesh), scSTREAM (general purpose Cartesian mesh), and HeatDesigner (Cartesian mesh for electronics). Since inception in 1984, Cradle has established itself as a major innovator for advancing the role of simulation in engineering design.

Brochure: http://us.cradle-cfd.com/pdf/case_studies/fluid-structure_interaction.pdf

Webinar: https://cradle-cfd.webex.com/cradle-cfd-en/playback.php?FileName=us.cradle-cfd.com/webex_wrf/sctetra_101_webinar.wrf

Detroit Engineered ProductsDetroit Engineered Products (DEP) is an engineering services, software development, consulting and staffing company. Since its inception in 1998 in Troy, Michigan, USA, DEP is now a global company.

DEP uses the accelerated and transformed product development process, by utilizing our platform, DEP MeshWorks. MeshWorks is known for capabilities like enabling rapid concept CAE and CAD model generation, parameterization of CAE models, enabling optimization, advanced meshing and CAD morphing.

Brochure: http://www.simulia.com/alliances/ebook/DEP_MeshWorks_brochure.pdf

Webinar: https://www.youtube.com/watch?v=Pb-RWLX0QJ8

DfR SolutionsDfR Solutions is the leading provider of quality, reliability, and safety services and software for the electronics industry. We support clients across every market as well as throughout the electronic component and material supply chain.

Our innovative, Physics of Failure-based reliability software, Sherlock Automated Design Analysis™ and industry expertise empower customers to accelerate and improve product design and development, saving time, resources, and improving customer satisfaction.

Brochure: http://www.simulia.com/alliances/ebook/DfR_Solutions_Brochure.pdf

Webinar: http://www.dfrsolutions.com/wp-content/uploads/2015/08/Improve-Thermal-Derating-using-Abaqus-and-Sherlock.wmv

EnduricaEndurica brings fatigue life prediction capabilities to the rubber industry that directly address fatigue in elastomers. We offer computer simulation software for engineers to address durability issues earlier than ever before. In addition to fatigue life simulation software, we also provide training, materials characterization, and consulting services and modeling.

Brochure: http://www.simulia.com/alliances/ebook/Endurica-fe-safe_Rubber_brochure.pdf

Webinar:https://www.youtube.com/watch?list=UUJIA37OF41KGT_ZgO_jJSDQ&v=100YNiCNO08

SIMULIA CONFERENCE EXHIBITION

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TotalCAETotalCAE sells and manages turn-key High Performance Computing (HPC) cluster appliances pre-integrated with your engineering applications including the entire SIMULIA portfolio. TotalCAE appliances are fully managed around-the-clock in your datacenter by TotalCAE experts. Engineers get fast turnaround with minimal effort through the included and easy to use TotalCAE portal interface.

Brochure: http://www.simulia.com/alliances/ebook/TotalCAE_Flyer_Final_02222016.pdf

Webinar: https://swym.3ds.com/#post:39887

TransvalorTransvalor S.A., is a software and engineering services company whose focus is the development and marketing of high-performance suite of simulation software for modeling the mechanical behavior, damage and failure of various classes of materials. Transvalor S.A. serves customers in the automotive and aerospace, energy and material suppliers industries.

Brochure: http://www.simulia.com/alliances/ebook/Transvalor_Z-brochure.pdf

Wolf Star TechnologiesWolf Star Technologies provides first to market solutions for Abaqus/CAE: True-Load™ turns any component into an N-DOF load transducer to generate strain correlated loading; True-LDE™ provides intuitive post-processing for linear dynamic FEA solutions. All Wolf Star Products automate the creation of complex loading events for design, optimization and durability analysis.

Brochure: http://www.simulia.com/alliances/ebook/Wolf_Star_True-Load_tri-fold-2016-02-04-HiRes.pdf

Webinar: http://www.simulia.com/alliances/ebook/Wolf_Star-SCC_2016_Baja_Car.mp4

SIMULIA CONFERENCE EXHIBITION

GrantaGranta helps you get the most from investments in simulation. We work closely with SIMULIA to enable direct access to materials data from within the Abaqus/CAE software. Save time in your design and development process, avoid error, increase confidence in simulation results, and deploy them for use in product development.

Brochure: http://www.simulia.com/alliances/ebook/Granta-MI_Materials_Gateway_for_CATIA_and_Abaqus.pdf

Webinar: http://www.simulia.com/alliances/ebook/SIMULIA-Granta_Design_Partnership.mp4

PsylotechPsylotech simplifies polymer simulation for ABAQUS users. Our VISCA software add-on module effectively models time, temperature and pressure effects on plastic and rubber, while also coupling mechanical loading to heat generation. Additionally, Psylotech provides contract testing services to produce the time and temperature dependent stiffness matrix needed by the model.

Brochure: http://www.simulia.com/alliances/ebook/VISCA-an-entropy-reduced-time-model.pdf

Webinar: http://www.simulia.com/alliances/ebook/VISCA-overview.mp4

Quest IntegrityQuest Integrity is a global leader in the development and delivery of asset integrity and reliability management services and solutions. The company’s solutions consist of technology-enabled, advanced inspection and engineering assessment services and products that help organizations improve operational planning, increase profitability, and reduce operational and safety risks.

Brochure: http://www.simulia.com/alliances/ebook/Quest_Integrity_Software_Solutions.pdf

Webinar: http://www.simulia.com/alliances/ebook/Quest_Integrity-Signal_FFS_and_FEACrack_software_demo.mp4

SGISGI offers a solution that simplifies high performance computing for CAE. SGI has created an easy to deploy, unified hardware platform that addresses advanced CAE applications and workloads. It allows our customers to leverage their hardware investments by simplifying integration with existing infrastructures and maximizing the efficiency of available licenses and IT personnel.

Brochure: http://www.simulia.com/alliances/ebook/SGI_At_A_Glance.pdf

Webinar: http://www.sgi.com/manufacturing

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Conference Registration We understand that it is increasingly difficult to justify time out of the office to attend conferences, trade shows and seminars. Need to justify attendance to your manager? Need to justify attendance to your manager? Download this letter!

Conference Registration FeesConference Pass: $1195 Training Day: $500 Day Pass: $595 Academic: $595

Full Conference Pass:Each Full Conference Registration includes:

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*Please note that verification of your student status or employment as a full-time instructor at an accredited academic institution is required at the time of registration.

Connect with Your Global Community and Network with Your Peers In addition to the usual breaks each day, we will offer the following networking opportunities:

• Welcome Reception – register on Sunday and join us for a drink

• Partner Reception

• Author Reception

• Conference Gala

Venue and AccommodationScience in the Age of Experience will be held at the Boston Marriott Copley Place in the stylish and trendy neighborhood of Boston’s Back Bay. One of Boston’s premier business hotels, the property is just minutes from Boston Logan International airport, Back Bay/Copley Train Station, Boston Common, Fenway Park and many other Boston attractions. Book your room early to secure our special discounted rate of $289/night.

Space is limited, so be sure to reserve your room quickly! Book your room today: https://aws.passkey.com/event/14204278/owner/249/home

About Boston Discover downtown Boston from our Copley Square hotelBeautifully appointed and perfectly located, the Boston Marriott Copley Place inspires truly unforgettable experiences for business and leisure travelers. The hotel places you in the heart of downtown Boston's famed Copley Square, just a short distance from some of the city's most popular attractions. The Boston Common and the Shops at Prudential Center are minutes from the doorstep; Newbury Street shopping is close by as well. Sophisticated rooms and suites offer plush bedding and high-speed Internet access; some also feature Charles River views. Enjoy delicious American dining and a vibrant atmosphere at the hotel sports bar, Champions, or stop by Connexion Lounge for a glass of wine. Relax after a busy day by swimming a lap or two in the heated indoor pool. Your downtown adventure begins here at the Boston Marriott Copley Place.

Airport Information• Boston Logan International Airport–BOS is approx.

5.1 km from the hotel

VENUE AND CONFERENCE REGISTRATION

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SIMULIA CUSTOMER PRESENTATION ABSTRACTS

CUSTOMER PRESENTATION ABSTRACTSThis program contains the abstracts of the papers submitted for presentation at Science in the Age of Experience to be held in Boston, MA, May 23-25, 2016. The abstracts are in alphabetical order by company name.

Optimization of Sheet Metal Forming Process Based on Sobal Sampling3dPLM Software Solutions Ltd.Yogeshkumar Dhankani, Shripad Kamlakar One of the most common industrial processes in sheet metal forming is deep drawing. Deep drawing process is a manufacturing process in which a sheet metal work piece is pressed into a die cavity such that stress induced on sheet is greater than its yield stress but less than ultimate tensile stress. The aim of successful deep drawing process is to produce a product with required final depth as well as with fewer defects. This study involves simulation of deep drawing process considering various parameters like blank holding force, punch and die corner radius and their effect on thinning rate of blank with constraints of wrinkle, rupture and stretching.

Robust design models for sheet metal forming process integrated sobal sampling with response surface method, in order to minimize impact of the variations and achieve reliable process parameters. A cup drawing example was employed to verify the feasibility of the proposed method. Rectangular cup model was made in 3DEXPERIENCE physics app using generative shape design and design space of input parameters was created using workflow with DOE (Design of Experiment) adapter in process composer. Response surface in high dimensional space was fitted to describe the mapping relations between an input and output parameters. The response surface could be used as the surrogate predictive models during optimization processes. Comparisons were conducted between different optimization models to demonstrate robustness of the sobal sampling method.

Keywords: SIMULIA, Design Optimization, Manufacturing, Optimization, Sobal sampling, Response surface method, 3DEXPERIENCE , Design of experiment.

Analytical Frame Design for Commercial ZTR MowersAriensAleysha Kobiske, Mathew Weglarz, Josh Wilson Computed simulation is a powerful tool that has the ability to predict the behavior and life of a structure. The difficulties in utilizing finite element software arise when determining how to implement the loads and boundary constraints into the model such that it mimics the real world. This paper will discuss how the engineers at The Ariens Company utilize Abaqus/CAE and fe-safe throughout the design process of a zero-turn mower. These two programs, in collaboration with Wolf Star Technologies True-Load software, are used to determine the life and actual loads acting on one of the current lawn-mower frames. Once these loads are known, the capabilities of Abaqus/CAE allow for the model of the current frame design to be easily and confidently constructed. The analysis of that frame is then used to drive the design of the new frame which is then analyzed with the loads from True-Load in Abaqus/CAE. When the correct loading is applied, the results are meaningful and representative of how the frame will respond in the real world. The outcome is that a better product is designed due to a deeper understanding of how the structure behaves.

Keywords: SIMULIA, Durability & Fatigue

Three-dimensional Numerical Foot Model for Running Shoe DesigningASICS corporationTsuyoshi Nishiwaki In the designing process of running shoes, some requirement functions such as stability, cushioning and comfort have to be considered. Many researchers have pointed out an importance of shoe stability, which means control of excessive foot and ankle joint motions or pronation, due to long term running with poor stability shoes causing various lower extremity injuries. Therefore, establishment of a prediction model of the requirement functions based on the computer simulation must be a strong means. Moreover, it can lead to a sustainable design without prototyping. In this study, footwear stability prediction method is proposed by using Abaqus. The numerical foot model, constructed by stacking computed tomography images, composes of 24 bones, cartilage, soft tissue, the plantar fascia and six ligaments. Ankle joint force and torque during the contact phase in running are used as loading conditions for the analysis. These components are obtained from the inversed dynamics analysis. In order to check the validity of the numerical model, planter pressure distributions and calcaneus eversion angles on the polymer foam sheets with three kinds of hardness were calculated and compared with the practical running motion analytical results. These values

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are corresponding to indices of shoe comfort and stability, respectively. From these results, the numerical model could predict not only the plantar pressure distribution, but also calcaneus eversion angle during the contact phase. This indicates that the proposed model is a powerful tool in the practical running shoe designing.

Keywords: SIMULIA, Biological Modeling

Analysis Tools for Accelerated Development of Composite MaterialsATA EngineeringJonathan Buck, David Najera Composite materials continue to rapidly improve in terms of structural performance. These materials offer the promise of significant weight reduction in many products particularly aerospace structures, where weight minimization is critical to both cost and overall performance. Despite this potential, however, several challenges prevent composite materials from being used as widely and pervasively as traditional materials. In particular, preliminary design concept evaluation of a structure with a novel material is difficult without a lengthy, expensive test program to provide the requisite material properties, but firms are justifiably reluctant to invest this time and money without confidence that the material under consideration merits such expense. Additionally, the stochastic nature of most composite materials means that a large number of samples may need to be tested and conservative knockdown factors be used in developing strength allowables. A unified set of analysis tools have been developed to address these challenges within two material architectures in mind, fiber-reinforced laminates and woven-fiber composites. Through the use of this tool, the tremendous savings in time and cost can be realized in developing and utilizing new composite material systems. Example applications will be shown to predict the strength of a particular material system.

Keywords: SIMULIA, Composites, Material Modeling, Process Automation

Applicability of Modal Dynamic Method in Seismic and Aircraft Crash Analyses of NPP Structures.AtomenergoproektVlaldimir Korotkov, Andrey Ivanov This work is considered to overview the applicability of modal dynamic method in seismic and aircraft crash analysis of NPP structures. In the work, soil-structure interaction is taken into account, the problem of 20%-limiting of modal composite damping is researched, and results of different methods (Direct integration method, modal method, and upgraded modal method, when projected damping matrix is fully populated) are compared on the test model and on the real structure model. A simple test was solved theoretically in Abaqus with global damping matrices acquired by modal and direct integration methods compared. It is worth noting that both methods are approved for use in dynamic analysis of NPP structures by ASCE 4-98, but in most cases direct integration method gives more conservative results.

Keywords: SIMULIA, Contact & Impact Mechanics, Dynamics & Shock

Weight Optimization of a Landing Gear Steering Collar using Tosca in AbaqusAventec Inc.Syed Noman Husainie, Syed Noman Husainie The adoption of topology optimization as a tool in the design cycle of a landing gear was tested using Tosca in Abaqus. The optimization process was carried out in collaboration with one of the leading landing gear manufacturers. The manufacturer is already a user of CATIA and Abaqus and was interested to see the capabilities of Tosca. To test Tosca’s capabilities, a landing gear steering collar which was already in production and had previously gone through several phases of design iterations was used as the sample component. The steering collar weighed 35.155 lb before the optimization and there was little room for further material reduction largely due to multiple contact regions and multiple loading conditions. The manufacturer had chosen the steering collar as a test to see the strengths of Tosca as far as contact nonlinearities and multistep analysis are concerned. The analysis included multiple loading conditions such as oversteer, maximum spin up, and fatigue. Various manufacturing and geometrical conditions were also taken into consideration. Using a combination of CATIA, Abaqus, and Tosca, an optimized steering collar design was achieved with an approximately 19% reduction in mass when compared to the original design of the steer collar. The final mass of the redesigned steer collar was 28.521 lb. The results were well appreciated by the design team of the landing gear and the team is now under consultation with senior management over the adoption of Tosca as a necessary tool in their design cycle.

Keywords: SIMULIA, Design Optimization, Optimization

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Flow Induced Vibration Modeling by using CFD/FEABaker HughesBin Zhu The modeling of flow induced vibration is of great importance in understanding the structure-fluid interactions, maintaining the safety of the equipment, as well as promoting productivity. The background of current work is about an x-annular flow valve oil completion tool (X-AFV) with high gas flow passing through the valve, causing pressure oscillation due to flow separation and high turbulence energy. The objective is to assess the vibration level in order to protect the tool from damage. The first step was to perform CFD simulation by using Fluent. The valve port region was identified as the primary vibration source. CFD was only conducted on this part of the tool. Turbulent transient flow was modelled with Detached Eddy Simulation (DES) turbulence model. The FFT was performed to yield PSD of pressure fluctuations at high turbulence region. The next step of the work was to extract natural frequencies of the tool by using Abaqus on a simplified geometry. The PSD of pressure fluctuations, representing the excitation force, was compared to the natural frequencies of the tool. The last step was to utilize Random Vibration Analysis to obtain the PSD and root mean square of stresses to assess the random vibration effect, by using PSD of excitation pressure obtained from CFD prediction. The results were discussed.

Keywords: SIMULIA, Material Modeling

Mechanisms-Based Fracture Model For Geological MaterialsBaker HughesTobias Hoeink, Tobias Hoeink, Alek Zubelewicz Over the past decade, hydraulic fracturing has become an industry-changing technology that enables commercial production of hydrocarbons from previously non-productive low-permeability shale formations. R&D efforts focus on the development of economically efficient production protocols, where the selection of engineering solutions is guided by numerical simulations. Typically, the simulations are based on phenomenological fracture models that are adapted for the prediction of fluid-driven fracture processes at depth. These models rely on a long-term trial-and-error approach and offer reliable material response at conditions that have previously been experimentally investigated. For this reason, an extrapolation of such phenomenological models into untested regimes is not always successful.

We break with the tradition of using phenomenology and, instead, construct a mechanisms-based fracture model for geological materials. Our modified Mohr-Coulomb fracture model is developed in the framework of tensor representation theory, which allows for a direct translation of fracture mechanisms and the observed inelastic deformation into a mathematically precise description. In our description, plastic deformation is rate dependent and dilatation is determined over a three-dimensional topography of the slip plane. The contribution of asperity degradation is also included. The model monitors crack orientations and, in this manner, adds to the fracture-induced anisotropy. Fracture strength is stochastic. We also introduce an effective stress that accounts for the hydraulic pressure deposited onto crack surfaces. Friction-induced damage and tensile fractures are the sources of an enhanced hydraulic permeability. Our permeability model is also stochastic, and it describes the formation of flow-channels due to the coalescence of micro-cracks in tension and shear. To illustrate the approach we choose material properties applicable to shale. We test the material model using uniaxial tension, compression and triaxial stress conditions on a single element before advancing to relevant subsurface model geometries.

Our current study focuses on the simulation of fluid-driven fracture near a pressurized wellbore. The results demonstrate that fracture growth is often dynamic; inertial forces play a significant role. Because fracture strength is stochastic, the process often becomes dynamically unstable and produces bursts of kinetic energy that propagate away from localized regions of low fracture strength. As expected, friction-induced damages are responsible for the formation of micro-channels, which in turn are connected to the channels formed by the dominant tensile cracks. The model is implemented to Abaqus/Explicit as a material user subroutine. We calibrate the properties of a shale-like material and study the material responses under axial loading and selected subsurface conditions.

Keywords: SIMULIA, Geomechanics (Oil & Gas), Material Modeling

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Coupling Reservoir Simulation and Geomechanical Modelling to Improve the Analysis of Hydrocarbon Reservoir BehaviorBaker HughesWouter van der Zee, Trevor Stoddard, Deric Stone, Maarten Voorn In oil and gas field development, reservoir simulation is applied to accurately predict and analyze fluid flow during production. The results of reservoir simulation can be used as input for 4D geomechanical modelling to obtain the earth’s mechanical response such as reservoir compaction. However, in such a one-way coupling scheme, the geomechanical response of a system has no influence on the reservoir simulation, whereas in real-life, the mechanical and flow behavior are not independent. In two-way coupling, this dependency is taken into account. Two-way coupling is performed using the JewelEarth platform, connecting CMG’s IMEX Blackoil simulator and Abaqus for the geomechanical simulations. In the coupling process, the available pore volume and pore pressures are updated in the reservoir at each time step, while not changing the fluid accumulations (masses). Optionally, the reservoir simulator’s internal geomechanical estimate is continuously enhanced with a pseudo-compressibility using the modelled geomechanical response. The differences between one-way and two-way coupling implementations are very clear when applied on a benchmark model used by numerous authors. However, the benchmark model was designed to show the largest possible effect of two-way coupling. When changing only a few parameters to more realistic properties, the one-way and two-way coupled results are much more alike. This shows that, while two-way coupling may be advantageous in some extreme cases, it may not be worth the extra simulation time and effort for each hydrocarbon reservoir.

Keywords: SIMULIA, Geomechanics (Oil & Gas), Multiphysics & Co-simulation

Thermal - Fluid Co-Simulation of DNA Sequencing ThermocyclerBecton DickinsonMitchell Gatesman Sequencing and amplification of DNA involves a precisely controlled thermal incubation cycle. Upscaling of traditional thermocyclers can be problematic due to non-uniformities induced across large incubation plates. Multiple chip profiles are studied to compare edge effects and promote uniform thermal histories across the incubation plate. Thermal performance is evaluated via steady-state heating within Abaqus/Standard. Transient cooling is modeled via Abaqus co-simulation by coupling thermal and fluid models.

Keywords: SIMULIA, Design Optimization, Multiphysics & Co-simulation

Implementation of a User Specified Ductile Fracture Constitutive Model using Abaqus User SubroutineBeijing FEAonline Engineering Co.,LtdFeiyi Du A specified ductile fracture constitutive model has been developed with Abaqus’ user subroutine VUMAT. Multiple constitutive behaviors have been considered, including elastic behavior, thermal expansion, J-C hardening plasticity, combined J-C and Mohr-Coulomb progressive damage and failure, and temperature dependent and rate dependent material property. In addition, Lode angle parameter effect (stress triaxiality effect) was taken into consideration for damage constitutive model. A conventional verification process has been achieved to prove the functionalities of the user subroutine. A metal plate under impact of a ball was modeled in Abaqus/CAE and the damage/fracture process was solved by Abaqus/Explicit. Different material property sets were used in this simulation, and the results were compared to show the differences between using subroutine and using Abaqus' integrated property module.

Keywords: SIMULIA, Material Modeling

Simulation Data Management in Pre and Post ProcessingBETA CAE Systems S.ADimitrios KatramadosThe ever growing demand for simulation modelling, driven by product design cycle duration and cost restrictions, has elevated the complexity and importance of simulation data management. The number of modelling simulations increases, while simulations also have to be performed with a faster. These pose new challenges for the quality assurance, productivity, and collaboration of designing teams who need to study numerous design changes and associate them with the corresponding results' changes quickly to evaluate new designs. To meet these requirements, existing solutions usually involve 3rd party software dedicated to the management of data interchanged between

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the modelling pre-processor, solver, and results’ post-processing software. However, in most cases, these solutions favour only one of the aforementioned software. BETA CAE Systems S.A. has been active in the field of simulation and data management for ten years, constantly developing solutions that follow modern trends in this field. The latest tool is an evolution of ANSA DM, the discipline-independent pre-processor data management solution, which now also includes post-processing. This means that both ANSA (pre-processing) and now also μETA (post-processing) have inherent data management capabilities. While still a user friendly, file-based tree structured system, ANSA DM builds on the existing, part level support, introducing two additional levels: the Simulation model and the Simulation run. In practice, coupled with the automation of loadcasing and post-processing, ANSA DM streamlines the association of part version with the corresponding models and simulation runs, helping to create and use a library of pre-processing files, runs, key results and reports. Post-processing actions can be automated and initiated within a single user interface and the resulting files and report (curves, tables/spreadsheets, videos, images) are exported linked with the corresponding simulation runs and can be readily displayed through a viewer in either ANSA or μETA. Additionally, the overlay and comparison of results from different design variants and runs is also facilitated, based on the associations built intrinsically between them. As such, the tool also minimizes user intervention which can be tedious and error-prone. Run from a known software environment also means it is easier to adopt and implement by users of ANSA and μ while, being a scalable solution, means that ANSA DM can be used from a single engineer up to multi-member teams. This presentation will demonstrate a process of using ANSA DM to setup a model process in ANSA, followed by running the ABAQUS solver to produce results. The results of interest will then be processed by μETA, saved compressed in its native binary format. ANSA DM thus proves to be a valuable tool in consolidating the modeling process from model pre-processing through the post-processing of its results which can then be archived with reduced disk space-footprint.

Keywords: SIMULIA, Pre-Processing, Post-Processing,

Model Order Reduction Methods for Explicit FEMBMW AGAli Cagatay Cobanoglua, Simon Mößnera, Majid Hojjatb and Fabian DuddeckaAbaqus/Explicit is a well established and widely used FEM solver for crash and pedes-trian safety simulations. However, due to the large number of degrees of freedom, simulation time is still a limiting factor especially in context of structural optimization. In typical crash simulations, a large portion of the model undergoes only elastic deformation. Hence, model order reduction (MOR) methods can bring a significant decrease in the computational time. While Abaqus/Standard already offers several reduction methods, MOR is currently not applicable for Abaqus/Explicit. The purpose of this work is to enable MOR for explicit finite element models by use of superelements. Reduced mass- and stiffness matrices are generated by Abaqus/Standard and transferred to the explicit solver through a VUEL-subroutine. The method is applied successfully to low speed vehicle crash simulations. The achieved results show a significant gain in computational time and underline the potential of MOR for Abaqus/Explicit.

Keywords: SIMULIA, Design Optimization, Optimization

Coupled Eulerian-Lagrangian Contact Modeling for Airbag Deployment SimulationBMW AGBastian Naeser, Sigrid Horz, Doris Ruckdeschel, Ivan Podkolzin The coupled Eulerian-Lagrangian (CEL) method in Abaqus/Explicit is essential in component design of head protection systems at BMW Group as it allows an accurate modeling of the gas behavior. However, due to the nature of the algorithm, the modeling of the contact between inflator gas and airbag membrane is a challenging task. Using conventional modeling techniques, two airbag membrane sections are not able to separate again, as soon as they come into contact, as the membrane elements are embedded into Eulerian cells entirely filled with inflator gas. The proposed modeling approach overcomes this severe contact issue and allows separation of the membranes after having been in contact. The method has successfully been applied for airbag deployment simulations within the development process at BMW Group.

Keywords: SIMULIA, Contact & Impact Mechanics

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Predicting Post-Drop Failure of Ceramic Chip Capacitors using Abaqus/ExplicitBoschVijeesh Vijayan Transients generated by drop can sometimes be severe enough to cause failure of electronic components. Ceramic chip capacitors form an essential part of modern day electronics. These are known to undergo flex cracking during board bending as would result from drop for example. Cracked c-chips would undergo burnout when electric current passes through it. Partial cracks can also result which may go unnoticed during functional tests and may result in catastrophic system failure during operation under harsh conditions. It is thus imperative that an efficient method exists for predicting post-drop failure of c-chips. Towards this goal, a case of capacitor burn-out during post-impact functional test has been taken up for the current study. With an objective of understanding the system dynamics and the mechanics of failure, explicit dynamic simulations were performed using Abaqus/Explicit. Simulations could predict existence of strain peaks exceeding the failure limits considered and existence of post-drop displacement hinges. The orientation of the c-chip was altered taking hints from the simulation. Further testing did not produce any system failure in post-impact functional tests. The paper discusses the methodology adopted in the current study and its limitations from the perspective of predicting failure, and suggests methods for diagnosing small SMD components effectively to avoid any catastrophic failure that may arise from latent failures that go undetected.

Keywords: SIMULIA, Contact & Impact Mechanics

Improving Rubber Tread Designs Against Heat Build-Up Under Cyclic Loading Using Strain EnergyCamsoSergio Arias, Dr. Bahram Sarbandi, Priyantha Sriwardene Heat generation in rubber is a complex phenomenon that occurs when a rubber component is being cyclically loaded. The development of this heat build-up comes from the visco-elastic nature of rubber compounds that occurs during the loading and unloading processes, and it is a difficult mechanism to quantify numerically. A lot of research on this particular and characteristic behavior of rubber has been done essentially since the invention of rubber. Over the course of the last decade or so, there have been numerous breakthroughs in the area of heat generation, and finite element codes are beginning to provide solutions to study this behavior. However, it is still a very complex parameter to measure and validate for practical purposes. As a result, an alternate way to devise a method to improve the designs of treads in our tracks against the development of heat build-up is to study the strain energy. The purpose of this research is to understand how we can use the strain energy developed under one full load cycle and utilize this to design a new and better generation of treads that can meet the constant increasing demands for performance in the world of rubber tracks.

Keywords: SIMULIA, Design Optimization, Durability & Fatigue

Simulating Blood Flow in a Living Heart ModelCapvidiaAndrey Aksenov, Lilia Begisheva, Ross Cotton, Tomasz Luniewski, Dean Vucinic, Wojtek Zietak Being able to visualize blood flow in a living heart helps to understand heart diseases and define strategy for surgical intervention. The ideal simulation should be performed on a specific patient heart model (individual geometry) to correctly asses the specific cardiac problem and predict possible treatment. In this paper, two approaches are presented for simulating blood flow using numerical CFD approach: simulation based on the SIMULIA Living Heart FE Model and simulation based on dynamic 3D heart model obtained from a 3D MRI/MRT scanner. The CFD simulation is performed in both cases using FlowVision CFD code. Both approaches provide a better understanding of the blood flow during a cardiac cycle. The simulation using dynamic heart model from 3D MRI has the advantage to be patient specific and can be used for diagnoses and definition of treatment strategy for a specific patient. The simulation based on the Living Heart FE Model is more suitable for function and performance evaluation of medical devices such as stunts or artificial heart values to understand and predict their influence on blood circulation system. Both approaches open new possibilities for cardiac related applications. As both methods are in a very early stage of the development, it is difficult to cover and predict all potential applications areas and benefits at this stage. This paper is intended to start the dialogue between cardiologists and engineers to challenge the limits of current technology.

Keywords: SIMULIA, Biological Modeling

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Two-Way Strongly Coupled FSI Simulation using Abaqus & FlowVisionCapvidiaSinan SoğancıCapvidia, being established in 1994, is a leading engineering software developer for CFD, MBD/MBE, CAD data translation/validation and reverse engineering areas. In CFD market, Capvidia has pioneered new technology to deliver complex and challenging FSI (Fluid-Structure-Interaction) simulations. This has been accomplished using co-simulation with Dassault Systems SIMULIA Abaqus and Capvidia FlowVision. FlowVision is a complete CFD software package, being developed for more than 20 years and used by engineers worldwide from various sectors. Due to unique capabilities like automatic mesh generation, FlowVision can easily be integrated with other FE codes. Integration with SIMULIA Abaqus is achieved through SIMULIA CSE (Co-simulation Engine) and provides capability for solving the most complex FSI problems. Automatic meshing and capability of dealing with dimensionality problems created a solution for problems like simulation of hydroplaning, simulation of sealing components, simulation of screw compressors and other complex multi-physics problems difficult to be addressed by other software on the market. Above all, Capvidia is pioneering the FSI market for over 10 years and tightly cooperated with Dassault Systems including active participation in research initiatives such as The Living Heart Project. The Co-simulation approach presented with Abaqus and FlowVision has several outstanding properties, as briefly described below: Two-Way Strongly Coupled FSI Simulation using Abaqus & FlowVision • Automatic Re-Meshing (Not Limited to Mesh Deformation) • Coupling; Natural Data Exchange between CFD and FE Meshes (No Intermediate Mesh like MPccI)

• Multi-Physics Manager; (Re)Starting Co-Simulation & Real-Time Results Monitoring • Completely Independent (Implicit/Explicit) Integration Steps • Data Exchange at User-Defined Number of Time Steps

Keywords: SIMULIA, CFD, MBD, MBE, CAD, FSI Simulations, CFD Coupling

Finite Element Analysis of Well Deformation MechanismsC-FER TechnologiesJueren Xie Over years, well deformation problems has drawn increasing attention from oil & gas industry. Severe well deformation may cause well failures due to reduced structural integrity (e.g. parting, collapse and buckling) and limited well access. Well deformations developed are often related to the stimulation methods where the operation pressure and temperature may cause structural and formation loads acting on the wellbore.

To develop well remedy and repairing strategies, Finite Element Analysis (FEA) is often used to determine and predict the magnitude of well deformations over the service history, as well as to understand the deformation mechanisms to relate to the cause of such deformations. This paper presents several FEA models used to analyze well deformations, such as casing connection parting, wellbore curvature, tubular collapse and buckling. A couple of field case studies are also presented to demonstrate the well deformation investigation approaches, which involve FEA, well caliper survey and the postulate of deformation mechanisms.

Keywords: SIMULIA,

Using FEA to Determine Test Speed for High Speed Shear Test on BGA based on Field ConditionsCISDI Engineering Co., Ltd.Sheng Li Accurate simulation of metal casting press-forming process needs to consider mutual coupling effects in a number of different fields of physics subsystem. Hydraulic systems, control systems and mechanical systems are the most important subsystems among them. It is difficult to create various subsystems in detail in single modeling tools, so co-simulation technology is used to take advantage of different tools to achieve the entire physical process of system-level simulation. The paper researched the co-simulation in the Abaqus software and the Matlab software based on FMI technology. It considered the coupling effect between different systems fully simulated and the metal casting press-forming process. The simulation result showed that co-simulation based on FMI can be well suited for multi-disciplinary co-simulation in complex mechanical model as it played a well-guiding role in the engineering design. The co-simulation would take more than traditional simulation computation time, but by using this technology it can be achieved to research the integrated features of the system, greatly reduce experiments costs and prototype trial risks.

Keywords: SIMULIA, Multiphysics & Co-simulation

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A model for Self-Pierce Rivet Process of a Boron SteelColorado School of MinesMartha P. Guerrero-Mata, Stephen Van Hall, Kip Findley Self-pierce riveting (SPR) is a cold joining technique used in the automotive industry in instances where resistance spot welding is not readily applicable, such as mixed material joints. Improving the mechanical properties of the rivet will enable greater versatility of standard rivet and die combinations as sheet material combinations increase in complexity. A 3D SPR flaring model was developed for a 10B37 steel to study the effect of different die velocities, friction coefficients, mesh densities and material hardness on rivet deformation. The material behavior was input via tensile testing data obtained with wire samples according to the ASTM E8 standard, while the die was assumed in all cases to be analytical rigid. The results were validated with data from laboratory trials of rivet flaring. The ultimate goal of the model is to develop a method to predict cracking at the tail of the rivet, buckling of the rivet legs, and other responses of the rivet in order to correlate rivet performance with alloy properties.

Keywords: SIMULIA, Manufacturing, Material Modeling

Simulation of Glass Forming of Automotive WindshieldsColorado School of MinesF. A. Celestino Guajardo, J. A. González Rodríguez, F. E. Palomar Pérez, and Oscar Zapata-HernándezIn recent years the automotive industry is looking for more complicated aerodynamic shapes in their designs. In windshield manufacturing industry, there is a need for new tools to predict the final shape of the glass obtained from the bending process. 2D and 3D finite element simulations were developed using Abaqus/Standard to predict the final shape of the glass during high temperature forming process. Uncoupled thermal and mechanical analysis were created, a viscoelastic material was considered for the glass and all properties were considered as function of temperature. Final shape results were compared with those obtained in real glass bending furnace.

Keywords: SIMULIA, Material Modeling

Predictions of Fluid/Structural Interactions using Abaqus Cosimulation and Advanced CFD SolversCombustion Research and Flow Technology, Inc. (CRAFT Tech)Peter Cavallo This work presents a coupled fluid-structural interaction (FSI) capability wherein pressure and thermal loads predicted by the CRUNCH CFD and CRAFT CFD Navier-Stokes solvers are exchanged with Abaqus/Standard using the Co-Simulation Engine (CSE). Multiple domains may be simulated concurrently on separate groups of processors. In applications to date, a single processor handles the data exchange with the Abaqus CSE, while many parallel processors solve one or more fluid domains. Data exchange is handled through SIMULIA’s Co-Simulation Engine API. The boundary surface common to the fluid and solid domains is defined, along with the specific scalar and/or vector fields to be exchanged. Point forces, heat fluxes, displacements, and temperatures are passed between the codes and simulations may be either one-way or two-way coupled. For FSI applications where the predicted deflections are small, deformations are ignored by the fluid domain and the fluid boundaries do not change. In cases where the predicted deflections are substantial, a two-way coupling has been established and demonstrated. The fluid boundary moves, with the predicted deformations, and a mesh movement solver is employed to redistribute the nodes in the fluid domain.

Applications of the FSI simulation capability to date include vibrational response of weapons bay doors to cavity acoustic loads, design guidance for FSI experiments, jet blast deflector heating and cooling, plastic deformation of a ruptured canister, and reentry capsule heating. The final manuscript will emphasize the relevant flow physics as well as aspects of the CSE implementation. All computations are performed on DoD DSRC platforms.

Keywords: SIMULIA, Design Optimization, Multiphysics & Co-simulation

Simplifying Composites Process Modelling in Abaqus with COMPROConvergent Manufacturing Technologies, IncAnthony Floyd, David van Ee, Corey Lynam, Goran Fernlund, Anoush Poursartip Simulation of the manufacturing of composite materials, composite process modelling, has been gaining acceptance since the early 1990s. Starting from simple 1D and 2D representations of composite parts, process modelling of complex, fully configured 3D composite parts is now performed on a regular basis. Such simulations, however, require a high level of expertise. These analysts must be experts not only in the manufacture of composite materials,

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but they must also be experts in 3D finite element analysis. Convergent Manufacturing Technologies has been enabling composite process modelling in Abaqus for over 15 years with its COMPRO libraries. In the past, using COMPRO with Abaqus required analysts to create their mesh in a certain manner, and then manually edit the Abaqus input file to include the options required to interface with COMPRO. This was a tedious process and prone to error. Recently Convergent has released an Abaqus CAE plug-in that walks the analyst through the workflow of creating a composites process model simulation and automates all the tasks required to set up the analysis with COMPRO. This CAE plugin has lowered the level of expertise required to perform these types of analyses, enabling broader adoption among OEMs. This paper will demonstrate how the use of the COMPRO Plugin for Abaqus CAE simplifies composites process modeling in Abaqus.

Keywords: SIMULIA, Composites, Manufacturing, Material Modeling, Multiphysics & Co-simulation

Using an Intermediate Validation Step to Increase CAE ConfidenceCornell UniversityChristopher Wolfrom, Megan Lobdell, Hubert Lobo Simulating a product before creating a prototype manages performance and production risks, saving time and money. These simulations contain assumptions and uncertainties that a designer must evaluate to obtain a measure of accuracy. The assumptions of the product design can be differentiated from the ones for the solver and material model through the use of a mid-stage validation. This is an open loop validation that uses a standard experiment to compare results from both a simulation and the physical experiment. From the validation, confidence in the material model and solver is gained. This study demonstrates the stages from material testing to the benchmark validation. Using a polypropylene, the material properties are tested to characterize for an *ELASTIC *PLASTIC model in Abaqus. The benchmark experiment of a quasi-static three point bending experiment of a parallel ribbed plate is then performed and simulated, demonstrating the complex stress state. A comparison of the strain fields on the face of the ribs obtained by digital image correlation (DIC) and simulation is used to quantify the simulation's fidelity to the physical experiment.

Keywords: SIMULIA, Material Modeling

FSI Simulation on a Reed Valve using SC/Tetra and AbaqusCradle North America IncYuya AndoSC/Tetra, developed by Software Cradle Co., Ltd., is a standalone general purpose CFD software based on unstructured Finite Volume Method solver. It can be coupled with Abaqus through the Co-Simulation Engine (CSE) to solve Fluid Structure Interaction (FSI) problems. SC/Tetra is capable of handling moving bodies using the Arbitrary Lagrangian-Eulerian (ALE) approach. It can also handle complicated motions with its Overset Mesh capability. Combining these capabilities makes it possible to handle motions in which one object touches another object or wall where fluid volume becomes zero. These capabilities enable SC/Tetra to handle challenging FSI simulations including large deformation and contacting motions. This presentation showcases several FSI simulation cases including a validation followed by a reed valve simulation. In this simulation, a reed valve is pushed open due to the pressure buildup caused by the motion of a piston. The reed hits a stopper and it comes back to the close position. This challenging motion (including the fluid volume becoming zero) is successfully simulated using ALE and Overset Mesh.

Keywords: SIMULIA, CFD, Finite Volume Method, FSI Simulations

Harmonizing High-Tech Product Performance and Safety by Electromagnetic and Structural Co-DesignCSTDavid JohnsElectromagnetic fields are used intentionally for communication, sensing, wireless charging, radar detection, medical imaging and microwave heating. While bringing huge benefits in the quality of life, electromagnetic fields are unintentionally absorbed by the human body, which has caused widespread concern about the potential detrimental effects on human health. High tech companies are increasingly recognizing the importance of balancing electromagnetic performance and safety early in design and electromagnetic field simulation is an essential part of this process. The huge pressures faced by companies to bring new products to market as fast as possible is also causing a shift towards multi-disciplinary design, where electromagnetic and structural design goals are optimized together, rather than in an isolated, dis-jointed fashion. This presentation will discuss the challenges designers face

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in balancing electromagnetic performance and safety, and highlight recent initiatives taken by CST and Dassault Systemes to deliver significant improvements in electromagnetic and structural co-design.

Keywords: Electromagnetics

Optimization of Heavy-Duty Cylinder Head Gasket Manufacturing Press Using IsightDana Holding CorporationJason Tyrus, Rohit Ramkumar, Kevin Shaver, Kevin Harris The production of heavy-duty cylinder head gaskets requires processing large sheet materials in a relatively short amount of time. In many cases, there is a need to quickly heat the materials to a consistent and uniform temperature. This high-volume process contrasts with a typical heated-press molding operation where the time required for each press cycle is much longer, on the scale of multiple minutes rather than seconds. Raw material weight of several kilograms and a required temperature increase of more than one-hundred degrees Celsius cause the power supply and control requirements to be very complex. Modification of platen designs and development of a new process require unique simulation techniques to optimize the process and equipment.

In this paper, Isight and Abaqus are used to simulate and improve the multiple-stage manufacturing process of heavy-duty cylinder head gaskets. An iterative procedure using Abaqus with programming is first used to identify the required power input to achieve steady-state press operation. An Isight process flow is then developed to simulate the manufacturing process of coils of material being fed into continuous process equipment and automatically bonded in a heated platen press simulated by Abaqus. Isight parameter studies are then applied to examine the heater power required to maintain a consistent temperature on the platens to minimize both heat loss and press stabilization time. It is demonstrated how the combination of Abaqus and Isight is used to improve both the heavy-duty gasket manufacturing process performance and the resulting product quality.

Keywords: SIMULIA, Composites, Design Optimization, Manufacturing, Optimization

Metal Fatigue: Failure and SuccessDassault Systemes UK LimitedJohn Draper Metal fatigue failures were first reported in the 1830's, and by 1860's many of the basic principles of fatigue had been established. The following 100 years were characterized by promising developments that were ignored or forgotten; and by a tendency to focus on topics which are now seen to be largely irrelevant. As a result, design errors common in the 1850's were still common in the 1950's. Fatigue life calculations were characterized by error and uncertainty.

Since the 1950's the accuracy of fatigue life predictions has been transformed, so that we can now predict allowable stresses to the same accuracy as those stresses can be calculated.

The accuracy of modern fatigue design methods is now focusing attention on fatigue testing and the test methods used to validate designs.

Keywords: SIMULIA,

Automated Translation of Non-Symmetric BGA Design into Copper-Featured Three-Dimensional Abaqus ModelsDfR SolutionsCraig Hillman The rapid growth of complex, three-dimensional (3D) packaging with non-symmetric structures has greatly increased the challenges in developing representative models for electrical (EMI), thermal (theta Jc calculations), mechanical (via delamination, warpage), and multiphysics simulation. This paper focuses on a technique to automate the extraction of accurate three-dimensional conductor geometry from traditional electronic CAD-to-CAM files formats (Gerber, ODB, IPC 2581, GDS II, MCM). Interfaces between materials sets are captured through interior identification of either vector data or image representation. Circular features in positive (copper) and negative (laminate) space are configured for mesh creation through defeaturing and computation of arc length segments. Curved traces and other features are translated into poly-lines using an advanced edge-detection algorithm. Segment-generating algorithm was developed to work with increased grid sizes, allowing users to select a larger grid size to smooth out small features without causing any gaps to appear between regions. User-defined regions allow for precise adjustment in mesh density and specificity of architectural features in specific areas. Two-dimensional representations are then

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built up into three-dimensional representations through extrusions, automatic combination of material sets, and merging of layer sets. Users are reporting 20X reduction in model build time with limited to no increase in simulation run time.

Keywords: SIMULIA, Electromagnetics

Vibrations Reduction and Control System Improvement using Abaqus/Dymola Co-SimulationDigital Product Simulation Inc.Christophe Baroux, Eashan Liyana, Moncef HammadiA gantry robot consists of a manipulator mounted onto an overhead system that allows movement across a horizontal plane. Gantry robot systems provide the advantage of large work areas and better positioning accuracy. Unfortunately, those systems are often susceptible to vibrations that are impacting the position control system and imply system instabilities. To reduce vibration and improve positioning accuracy, a solution is to develop a controller which achieves a smoother motion. In this case, co-simulation between plant, i.e. finite element models, and logical control systems model is needed to introduce analytical logic within multi-physics systems simulation. The capability of coupling Abaqus and Dymola can be used to leverage logical-physical modeling versatility. CATIA V6 platform is actually relying upon this philosophy enabling an innovative and iterative approach of finite elements simulation through an integration of control systems models to physical and multi-physical models. A typical application workflow can be detailed as followed: measured data (sensors) are issued from Abaqus simulation then passed to Dymola which computes loads and/or displacements (solicitations) needed to attain Abaqus models steady state. This paper intends to present how we implemented this co-simulation process and results we obtained this way.

Keywords: SIMULIA, Multiphysics & Co-simulation

Modelling of Hytrel® Thermoplastic Elastomer Material for High-Strain Cyclic LoadingDuPont de NemoursPieter Volgers TThe Jounce bumper or spring assist is an important and active part of a vehicle’s shock-absorber system, which serves not only to protect the coil spring and damper but also improves vehicle ride and handling and influences the level of comfort by absorbing small movements, such as irregular road surfaces. Currently made from natural rubber or PU foam, DuPont has developed a new innovative solution using blow-molded Hytrel® thermoplastic elastomer, using the same manufacturing process as for CVJ boots. To support the (patented) design of the shape needed to obtain the required response curve, a simulation procedure has been developed to predict the load-displacement curve. The subsequent compression response after initial loading, which is different from the initial response curve due to the material behavior typical of elastomers, is important for the design. To that aim, a material model for large displacements (part compression of 80%) and large elastic deformations (up to 100% strain), including plasticity and loss of stiffness is required. Abaqus allows the combination of hyper-elastic models including Mullins™ effect and permanent set, which provides the fundamental behavior of the material. However, Hytrel® thermoplastic elastomer behavior is somewhat different than most elastomers, with a particularly high permanent set. This paper describes the challenges, limitations and success encountered when applying this material model to the behavior of Hytrel® in a Jounce bumper application.

Keywords: SIMULIA, Material Modeling

A Simulation Approach to Combine Multi-Scale Model Features with Failure at Composites Level for Short Fiber Reinforced PolymerDuPont de NemoursZhenyu Zhang, Alan Wedgewood, Helga Kuhlmann In order to facilitate the application of thermoplastic composites in the automotive industry for weight saving and fuel economy, an advanced simulation approach is applied to evaluate the performance of an injection molded short fiber reinforced composites beam. A fully coupled Digimat with Abaqus homogenization method for multi-scale modeling is explored and compared to an uncoupled Digimat� with Abaqus approach which uses an Abaqus user subroutine. A failure model is calibrated to predict short fiber reinforced composites failure. The results obtained with this model are presented, demonstrating accurate prediction results. The developed model with homogenization features is able to distinguish the behavior of beam with different injection molded process and is validated by comparing predicted results with experimental data of beam flexure test under different boundary conditions.

Keywords: SIMULIA, Composites, Contact & Impact Mechanics, Manufacturing, Material Modeling

SIMULIA CUSTOMER PRESENTATION ABSTRACTS

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Prediction of Nonlinear Viscoelastic Recovery of Thermoplastic Polymers using Abaqus Parallel Rheological Framework (PRF) ModelDuPont Performance MaterialsMohammed Karim, Zhenyu Zhang, Ye Zhu Thermoplastic polymers show significant nonlinear viscoelastic behavior due to which, after removing the applied load, these materials have some viscoelastic recovery over time before permanent deformation or set occurs. In this work, Abaqus PRF model is used to predict this time dependent viscoelastic recovery. Unlike linear viscoelastic model in Abaqus, PRF model can predict the typical nonlinear viscoelastic behavior of thermoplastic materials. Two types of testing, stress relaxation and cyclic loading at three different strain levels, are used to calibrate the coefficients of PRF model. SIMULIA’s optimization tool, Isight, is used to optimize these coefficients. Using the optimized coefficients, the PRF model is able to predict the time dependent viscoelastic recovery of thermoplastic polymers.

Keywords: SIMULIA, Design Optimization, Material Modeling, Optimization Methodology of thermal-structural analysis in Abaqus software based on plastic fuse-box

Crack Damage Tolerance Assessment and Leak-before-break Flow SimulationEaton CorporationJian Ye In aircraft bleed air system ducts, cracks may exist or initiate from manufacturing defects in areas of high stress concentration which are usually in welds. The initial minor cracks may grow into two possible failures: either the crack grows steadily through the wall to form a stable through-crack (leak-before-break), or it becomes unstable before or after it has reached the other surface of the duct wall and spreads rapidly over a large portion of the duct (break-before-leak), depending on the pressurized hot-air load and the toughness of material. For the safe design of bleed air system ducts and assessment of ducts with minor cracks found in the quality inspection, it is required to understand and predict the crack behavior and leak-before-break leakage rate. In this study, Extended Finite Element Method (XFEM) is used to evaluate if the initial crack will grow into unstable failure. Abaqus CFD is used to calculate the leak-before-break crack leakage rate in the case of a stable through-crack, utilizing the crack dimensions obtained from crack propagation simulation. The leakage rate result compares well with an existing explicit equation that describes the idealized zig-zag crack flow channel.

Keywords: SIMULIA, Manufacturing

Computing Durability for Elastomer ProductsEnduricaWilliam Mars Elastomer component developers face two typical risks in durability programs, the risk of 1) premature failure, and 2) of costly overdesign. Come learn how Endurica solutions offer simple to use, realistic approaches for getting durability right. We will review our elastomer characterization methods, material models and damage accrual methods in the context of applications including an automotive cradle mount, a tire, and an aerospace rotorbearing. Endurica LLC provides solutions for developers seeking durability in elastomer products. Our solutions include: e-safe/Rubber, our plug-in for the fe-safe fatigue analysis environment; Endurica CL, our stand-alone fatigue analysis solution; Fatigue Property Mapping, our materials characterization service.

Keywords: SIMULIA, Rubber, Durability, Elastomer, fe-safe/Rubber, fe-safe, fatigue

Implementation of an Elasto-viscoplastic Constititive Law in Abaqus/Standard for an Improved Characterization of Rock MaterialsEni S.p.A.Giorgio Volonté Subsidence modeling is an important issue in the oil and gas industry, for the environmental and operational implications associated to this phenomenon. Abaqus/Standard has been used for many years in Eni as the main numerical simulator for studying the geomechanical behavior of reservoirs. The large amount of monitoring data and the advanced analysis of laboratory experiments that are now available have shown that, in some cases, an improved mechanical characterization can be tailored to better capture the complex behavior of the reservoir rock under the effect of underground fluid withdrawal. In this work we first present an implementation in Abaqus/Standard of an elasto-viscoplastic model namely the Vermeer and Neher model as user defined material by means of the UMAT

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subroutine. Next, we provide the results of various simulations of laboratory tests that have been performed to investigate its capability to identify all the specific features of the behavior of reservoir sands. Finally, we show a preliminary application to a synthetic, nonetheless realistic, reservoir model that has been performed to assess the capabilities of the elasto-viscoplastic model in the simulation of subsidence evolution.

Keywords: SIMULIA,

Mechanics of Hydraulic Fracturing in Ultra-low Permeability Formations: the Role of Cavitation and SorptionExxonMobilSandeep Kumar, Matias Zielonka, Kevin Searles, Ganesh Dasari Hydraulic fracturing (HF) comprises nucleation and growth of fractures in rock formations via flow-induced pressurization. HF is routinely used as a means of stimulating low permeability rock formations to enhance the oil/gas recovery. The physical processes in the fracture process zone (FPZ) during HF are usually very complex because of the coupling between fracturing-fluid flow, rock deformation and diffusion of host fluid. Identifying all the critical pieces of physics is the key to developing a reliable full-physics modeling and simulation capability. Such a capability will not only enhance our understanding of HF but will also aid greatly towards the development of an effective stimulation strategy.

The role of cavitation and sorption is typically ignored in hydraulic fracturing simulations because the rock formations are believed to remain always fully saturated during HF. However, by combining the multi-physics Finite Element Analysis (FEA) with the analysis of Polyaxial Test Cell (PTC) experiments, we show that ignoring cavitation and sorption leads to spurious outcomes in the FEA simulations of fluid-driven fractures in low permeability formations. The FEA simulations, in the absence of cavitation and sorption, predict an unrealistically large suction (negative pressure) ahead of the crack-tip which grows without bound upon refinement of the FEA mesh. Because of such a large suction at the crack-tip, the break-down pressure obtained from the simulations is anomalously large and lacks objectivity (i.e., progressively increases upon a continued refinement of the FEA mesh).

Mechanistic insights gained form FEA simulations suggest that the negative pressure ahead of the crack-tip causes cavitation, resulting in the creation of a partially-saturated region around the crack-tip. This means that irrespective of the initial saturation of the rock, inclusion of cavitation and sorption phenomena in the modeling is necessary for adequately resolving the physical processes in the FPZ. The revised FEA simulations of hydraulic fracturing show that the inclusion of cavitation and sorption in the simulations eliminates the unrealistically large suction at the crack-tip, regularizes the break-down pressure and removes the noted lack of objectivity.

Keywords: SIMULIA, Geomechanics (Oil & Gas)

Vehicle Durability Simulation Using Contact Nonlinearity and Discrete Spot Weld ConnectorsFCA Engineering India Pvt LtdRoshan Mahadule, Kameshwar Rao Appana Vehicle durability is one of the important areas in overall vehicle design space. This is a key attribute which builds perception of a vehicle in customer’s mind. Now days, Computer Aided Engineering (CAE) is used extensively in the automotive industry to predict the durability performance of a vehicle. Early prediction of real durability issue and evaluation of different design proposals to improve the vehicle durability performance saves great amount of time and cost.

Conventional process for predicting vehicle durability employs linear inertia relief analysis to derive stress response of a structure. Strain based fatigue life analysis is carried out for the stress response which is scaled by virtual proving ground loads obtained from multi body dynamics simulation software. Fatigue life predicted with this method does correlate the test results but many a times more conservative. This is mainly contributed by local force transfer through spot weld connectors represented with rigid elements.

This paper describes an approach for vehicle durability assessment considering contact nonlinearity in full vehicle model and non-rigid spot weld connectors. This approach is chiefly modified over conventional process to simulate load transfer more precisely through surface interaction; this eliminates the pseudo low life regions and thus minimizes the overall design development time, cost and weight. Vehicle durability simulation with new approach predicts fatigue life with more accuracy and reliability.

Keywords: SIMULIA, Contact & Impact Mechanics, Design Optimization, Durability & Fatigue

SIMULIA CUSTOMER PRESENTATION ABSTRACTS

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Prediction of Aluminum Wheel Distortion under Pothole ImpactFCA Engineering India Pvt LtdMohammed Billal Kamal, Gurumoorthy Sankara Subramanian In the vehicle design, the interaction between road and vehicle is the main subject in order to meet the durability , NVH & handling performance. Potholes in the road will cause damage to the wheel, suspension and chassis components. Pothole size and vehicle speed are the main factors for the damage. The larger pothole will cause severe damage or alignment issues. Based on the impact severity , damage will happen in the wheel rim and there will be a reduction in the air pressure in the tire. In long-term, it will damage the suspension or steering components and it can also leads to premature tire wear and poor handling of the vehicle. Prediction of pothole effect in the vehicle will be useful for redesigning the components at the design stage itself to avoid the damage. To predict the pothole event , several methods and virtual tools are available. The nonlinear dynamic behavior of the vehicle during pothole impact will be captured accurately using Abaqus FE solver. The tire model plays a vital role by absorbing energy during the impact. The effect of vehicle speed at pothole impact is also studied. The CAE model of tire is validated with some physical test results and it is used in the vehicle pothole impact simulation. This paper explains more about the modeling of tire, suspension and vehicle, simulation methodology and the correlation of CAE results against the test values. This pothole impact simulation method gives an indication to make the design changes also.

Keywords: SIMULIA, Contact & Impact Mechanics, Dynamics & Shock, Multi-body Dynamics and Systems Engineering, Multiphysics & Co-simulation, Tires

Progressive Damage and Failure analysis of Automotive Wheels Using an Explicit Finite Element MethodFCA Engineering India Pvt LtdMohammed Billal Kamal, Gurumoorthy Sankara Subramanian Material degradation and dynamic loadings are the main reason for the damage in metals. Material degradation is caused by crack initiation and fatigue or dynamic loadings are the source for crack growth. The precise and realistic modeling of an inelastic behavior of metals is crucial for solving several problems in engineering fields. Presently, to predict the initiation and growth of damage, there are several failure models & theories are available. In this paper, progressive damage and failure material model using explicit finite element techniques are applied to predict the failure of aluminum alloy .This material model has the ability to predict the damage initiation as a result of ductile and shear failure. Based on the specified damage evolution process, the material stiffness is reduced progressively after the damage initiation. The progressive damage models allow a smooth degradation of the material stiffness, in both quasi-static and dynamic situations. Further in this paper, for tensile and shear failure, the material model is validated for standard specimens. Then the validated material model is adopted in the damage prediction of the aluminum wheel due to compression load and good correlation is achieved within 5% of deviation.

Keywords: SIMULIA, Buckling & Collapse, Material Modeling

Cylinder Head Valve Guide Wear Analysis of Internal Combustion EngineGeneral MotorsCherng-Chi Chang, Michael Nienhuis, Bo Yang, Saurabh Bahuguna An analytical process was developed to study the root cause of the exhaust valve guide wear in the gasoline engine from a high mileage accumulation vehicle test. A thermo-structural model was created to determine maximum cam bore misalignment based on engine thermal structural analysis. Then a valve train dynamic model was developed as a submodel based on cylinder head thermal deformation, the cam axis was adjusted based on the maximum cam bore misalignment in this dynamic model and valve tip side load from cam and rocker arm was calculated. Normal and reversed spin of cam was performed to study its effect on rocker motion between left and right bank cylinder heads. Valve and guide contact was monitored during the dynamic analysis and the resulting valve and guide deformation from this dynamic analysis was input to a tribology model to calculate the guide wear rate. Abaqus/Standard was used in thermo-structural analysis, and Abaqus/Explicit was used for valve train dynamic analysis. Based on this study, the root cause of the guide wear was verified.

Keywords: SIMULIA, Durability & Fatigue

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The Application of Abaqus in Optimization Design for Headset Metal ShrapnelGN netcomLi Lin, Qiufeng Guo The metal shrapnel in a headset headband slider is the key part for headband adjustment to fit different head sizes. However, the shrapnel dimension is always very limited, so it is not easy to balance its safety and the resilience force, both which are closely related to user experience. The trial and error process may take a long time to get a proper dimension parameter. The rapidly development of consumer electronics, better user experience, shorter research term and lower cost means more competition. In this paper, Abaqus/Standard was used for the optimization design of the metal shrapnel in a headset headband slider to make it offer enough resilience force in limited space, without obvious plastic damage or even crack, and increase its durability. It is a much faster way for engineers to determine the dimension parameter. This method could also be applied to similar shrapnel design in other consumer electronics products.

Keywords: SIMULIA, Design Optimization, Durability & Fatigue, Optimization

Materials Gateway 4.0 for Abaqus/CAE – Preparation, management and use of materials data for simulationGranta DesignPeter ChernsMaterials information management is important throughout the simulation lifecycle, and it plays a crucial role in successful, fast, accurate CAE. This presentation focuses on the software tools provided by Granta Design to enhance the capture, preparation, management and use of materials data in order to support these activities. Granta Design are based in Cambridge, UK and have been focused on the field of Materials Information Technology for more than 20 years. The latest version of the industry leading GRANTA MI software, including direct integration with Abaqus/CAE, will be demonstrated. GRANTA MI:Materials Gateway for Abaqus/CAE enables users to directly access and use validated CAE material models from their materials database without leaving the CAE environment. Import of this data is carried out while retaining full traceability to the source. The demonstration will focus particularly on recent enhancements in the selection and import of complex parameterized data and the ability for users to make controlled updates to data pre-import.

Keywords: SIMULIA, Materials, CAE

Crack Analysis in Molybdenum Glass Melting ElectrodeH.C.StarckAbhishek Bhattacharyya, Paul Aimone Molybdenum high melting point, high electrical conductivity, resistance to sagging at glass bath temperatures, and resistance to attack by most glasses make it an ideal material for glass melting electrodes. However, dissolution of Mo electrodes still occurs during glass melting and processing. A single piece molybdenum electrode was found to have cracked at the end of its service life. Post-mortem analyses also showed melting of the molybdenum material in the crack region. Abaqus finite element simulations were used to evaluate the crack formation. This study involved sequential thermal-mechanical modeling to predict the crack size and location. The FEA model was qualitatively successful in predicting the crack morphology based on very limited operational knowledge. The simulation results were compared with post-mortem experimental study to evaluate necessary design changes for improving electrode life.

Keywords: SIMULIA, Design Optimization

Evaluation of Effects of Trapped Fluid on Downhole Tool DeformationHalliburtonAllan Zhong During finite element analysis of downhole tools, the fluid load, such as hydrostatic pressure, reservoir pressure, or applied pressure, is simply represented by uniform static pressure/stress. This approximation of fluid load has been shown to be effective and accurate enough for many applications and is widely accepted. However, this fluid load representation can be problematic in terms of trapped fluid because the pressure from trapped fluid, which is typically confined between seals, changes with deformation or deflection caused by applied pressure or axial tensile or compressive loads on surrounding structures. This paper uses a finite element algorithm to model trapped fluid,

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thereby accounting for the coupling between the deformation of the surrounding structure and pressure from the trapped fluid acting on the structure. The algorithm is applied to evaluate how the pressure of trapped fluid between sealing points in the annulus of a tubing string change with surrounding pressure: 1) under a very high production flow, the tubing pressure drops significantly, it is important to know whether the trapped fluid will cause tubing or a tool component to collapse or not; 2) in reverse, during setting process, it important to know the amount of pressure increase from the fluid in the sealed-off section. Comparisons of predictions from models with and without fluid highlight the need to account for fluid structure interaction in evaluating the effect of trapped fluids.

Keywords: SIMULIA, Multiphysics & Co-simulation

A Simplified 3D Numerical Scheme for Accurate Calculation of Critical Value of Pressure Draw-down of Weak Sand FormationHalliburtonXinpu Shen, Guoyang Shen, William Standifird The critical value of pressure drawdown (CVPDD) is a key parameter for controlling production rate for most of the wells in weak sand formations and depends on the form of completion, particularly for HPHT. This paper presents a simplified 3D calculation of CVPDD on the basis of maximum plastic strain for a given well in offshore Gulf of Mexico. A fully-coupled, poro-elastoplastic model was adopted to simulate the porous flow that occurred simultaneously with matrix inelastic deformation. A submodeling technique was adopted to address the discrepancy between the scale of the oil field and that of the wellbore section. Dual-stress-concentration around the perforation tunnel was simulated. Resultant values of plastic strain caused by pressure drawdown were visualized and analyzed along with the distribution. Values of CVPDD were suggested on the basis of a numerical solution of plastic strain. The method proved to accurately predict CVPDD. Visualization of 3-D numerical results not only illustrates the values of plastic strain, but also shows the size of the plastic region induced by pressure drawdown, which is useful in selecting the CVPDD. Results presented here indicate that the 3-D finite element method is a highly efficient tool for predicting CVPDD.

Keywords: SIMULIA, Geomechanics (Oil & Gas), Multiphysics & Co-simulation

A Simplified 3D Numerical Scheme for Accurate Calculation of Critical Value of Pressure Draw-down of Weak Sand FormationHalliburtonXinpu Shen, Guoyang Shen, William Standifird The critical value of pressure drawdown (CVPDD) is a key parameter for controlling production rate for most of the wells in weak sand formations and depends on the form of completion, particularly for HPHT. This paper presents a simplified 3D calculation of CVPDD on the basis of maximum plastic strain for a given well in offshore Gulf of Mexico. A fully-coupled, poro-elastoplastic model was adopted to simulate the porous flow that occurred simultaneously with matrix inelastic deformation. A submodeling technique was adopted to address the discrepancy between the scale of the oil field and that of the wellbore section. Dual-stress-concentration around the perforation tunnel was simulated. Resultant values of plastic strain caused by pressure drawdown were visualized and analyzed along with the distribution. Values of CVPDD were suggested on the basis of a numerical solution of plastic strain. The method proved to accurately predict CVPDD. Visualization of 3-D numerical results not only illustrates the values of plastic strain, but also shows the size of the plastic region induced by pressure drawdown, which is useful in selecting the CVPDD. Results presented here indicate that the 3-D finite element method is a highly efficient tool for predicting CVPDD.

Keywords: SIMULIA, Geomechanics (Oil & Gas), Multiphysics & Co-simulation

Integration for installation Upper Body of the European semi-bonnet TruckHyundai Motor CompanyJi Yong Song, Wook Jin Na The semi-bonnet truck consists of chassis cab composed of cabin (CAB) and chassis frame and upper body (UB) such as tipper and box etc. And chassis cab is composed of cabin (CAB) as passenger space and chassis frame. The upper body is equipped in the upper body frame on chassis frame. The motor company manufactures and sells chassis cab and upper body & upper body frame are manufactured by body builder company for manufacturing specially equipped vehicle. For selling chassis cab in European region, the motor company has to offer various design and manufacture condition to body builder company. This is called BBM (Body Builder Manual).

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In this study, the simulations are carried out under several loading conditions (Normal loads, Abuse loads, Special loads) in various specially equipped vehicles (Tail-Lift Box, Sidewards of Tipper, Backwards of Tipper vehicle etc.) for ensuring robustness of connection part of chassis cab and upper body of H350 vehicle exported firstly among commercial vehicle of Hyundai Motor Company. The simulation is performed in full car FE-model by replacing dynamic load with static load using contact condition and non-linear material property. And the structure adhesive is modeled into solid elements and connected with parent metal using tied contact in the FE-model. Also, the bolt looseness can be predicted by calculating axial and shear load in bolt connection part. It was able to secure stiffness and strength of connection part of chassis cab and upper body through this simulation process using Abaqus/standard, and optimize the position and number of the chassis bracket.

Keywords: SIMULIA, Durability & Fatigue

Virtual vehicle evaluation using Abaqus / FTire co-simulationHyundai Motor CompanyTaekyoung Uhm, Keun-Hyung Bae VPG (Virtual Proving Ground) is a good numerical tool for virtual evaluation of vehicles. It can be implemented by finite element method or multi-body dynamics. Each method has its merits and demerits. Computational reliability and costs are always trade-off parameters. Abaqus / FTire co-simulation is a good trade-off point for them.

In this paper, the virtual vehicle evaluation methodology employing Abaqus / FTire co-simulation is proposed. The application area includes the vehicle evaluation for durability, body stiffness, etc.

Keywords: SIMULIA, Multiphysics & Co-simulation

Evaluation of Tennis Racket Swing During Impact with a Tennis BallIllinois Institute of TechnologyRoberto Cammino, Feijia Zhang, Junxiong Zhang This report analyzes the differences in the ball exit velocity (BEV) when a ball arriving at a given velocity is hit at different points on the string bed of a racket and describes the reaction force on the handle of the racket through the use of Dynamic Finite Element Simulations. The objective is to prove that the Finite Element Method can be used to determine optimal hitting points for rackets during a tennis match. Optimal hitting points are considered to be the ones producing the fastest BEV and lowest reaction force on the user’s hand. Eleven different spots were analyzed. The incoming ball velocity was assumed to be 40m/s and the racket rotational swing speed was assumed to be 0.05 rad/ms. The results show that it is feasible to simulate the impact of a ball with a racket and determine stresses on the racket as well as the BEV and reaction force on the user’s hand using Dynamic Finite Elements and Abaqus Explicit. This work can be very insightful into using Finite Element Simulations to determine optimal racket swing speeds and ball hit positions for a tennis player to create optimal plays during a match.

Keywords: SIMULIA, Contact & Impact Mechanics

Baseball Bat Swing Analysis using Finite Element MethodsIllinois Institute of TechnologyRoberto Cammino, Ruthie Sellers, Chaemoon Lee, Yong Hau Boo, Aiman Shibli This paper builds on previous undergraduate research done on the analysis of a baseball bunt. In that situation, the bat was held stationary while the ball was launched at a given velocity. In this research, the bat is allowed to swing with the swinging motion controlled by the user. The end result is a determination of the optimal position to hit a ball during a bat swing on an approaching ball as well as the optimal swing pattern. The ball exit velocity and direction is obtained after the impact with the bat. The results will not only show the direction the ball will travel, but how far it will travel as well. Bat stresses are also determined for each impact. For simulation purposes, the ball was designed to have material properties similar to that of the official ball used in Major League Baseball, while the bat was designed specifically to use the material white ash wood and aluminum. The bat was also designed to have a rigid grip. The primary goal of this research was to show the advantages of utilizing finite element analysis applications in sports. The results will show that accurate results can be attained if the simulations mimic that of the real case. In this manner, guidance can be provided to players on the optimal swing pattern to apply for different approaching ball launches. All simulations are run using Abaqus Explicit.

Keywords: SIMULIA, Contact & Impact Mechanics

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Evaluation of Baseball Bats on Impact with a Baseball During a Bunt HitIllinois Institute of TechnologyRoberto Cammino, Rodrigo Pozza, Joao Santana, Gustavo Gois, Aiman Shbili, , This report describes the stresses on a baseball bat and analyzes the differences of the ball exit velocity (BEV) when hit at different points on the bat during a bunt hit, where the bat stays stationary on approach of the ball. The bat was made of a white ash wood with 33 inches of length and the ball used was the model ROLB2 from Rawlings. Eight different spots were analyzed, all of them between 5 to 7 inches from the top of the bat. The pitcher ball velocity was assumed at 90 miles per hour and the bat swing speed was assumed at between 49 miles per hour to 58 miles per hour depending on the spot that the ball hits the bat. Excel, SolidWorks, Hypermesh and Abaqus were the programs used in this research. Results showed that 7 inches from the tip of the barrel is the sweet spot i.e. the best spot to hit the ball, where the highest BEV was reached and the bat had the lowest stresses.

Keywords: SIMULIA, Contact & Impact Mechanics

Evaluation of Brain Stresses during Car Crashes using the SAE Baja Racecar Test VehicleIllinois Institute of TechnologyXiaorui Shangguan, Xiaorui Shangguan, Haoyang Yan, Roberto Cammino, Aiman Shibli Abstract: This report describes the result of a research project focused on driver's brain damage evaluation during front impact of the Baja SAE race car to a wall. Two kinds of situation were considered in this analysis: a driver with and without a seat belt. The goal of this project is to check the amount of stress absorbed by the brain during impact and evaluate the role of the seat belt during impact. The analysis consists of a dynamic simulation of an impact of a car frame on a wall by using Finite Element Analysis (FEA) method. Models were meshed by using HyperMesh (a FEA pre-processing software). After finishing modeling, results were calculated and analyzed by using the Abaqus/Explicit (a computer aided engineering program) explicit solver. Results include the stresses, energy, velocity, acceleration and displacements experienced by the following elements of our model: brain, neck, dummy body and car frame. The results obtained from the analysis were displayed through charts.

Keywords: SIMULIA, Assemblies, Biological Modeling, CAD Integrated Analysis, Contact & Impact Mechanics, Design Optimization, Dynamics & Shock, Multi-body Dynamics and Systems Engineering, Optimization

Experimental Co-relation of Vibration Welded Bead's Burst Pressure using Finite Element TechniquesIllinois Institute of TechnologyPraveen Sathanam Ravichandr, Rodrigo Orozco, Roberto Cammino This report describes the results of a project focused on obtaining the yield stress at the weld bead of a vibration welded pressure vessel. The burst pressure of 0.508 bar was obtained from the hydrostatic pressure test data performed experimentally. The aim of this project is to verify the amount of stress generated at the weld bead as it is observed in the hydrostatic pressure test that the rupture occurs in this region and formulate a failure criterion. Additionally, the project investigates the best methodology of mesh by playing with the various parameters like geometric modelling, order of elements and type of contact in Hyper mesh 13.0 in order to obtain maximum correlation with experimental data. The material used for the vessel is Thermylene (a polypropylene composite material which is proprietary to Asahi Kasei Plastics NA) and a bonding resin compound for the bead. The analysis consists of Non-Linear Geometric Static simulation of applying 0.075 MPa of pressure (to get more data points in yield condition and observe geometric behavior) to the vessel using Finite Element Analysis. Both the full and quarter model was meshed using Hypermesh and analyzed in Abaqus. The results obtained from the analysis were displayed using stress plots.

Keywords: SIMULIA, Assemblies, CAD Integrated Analysis

Why Intel for HPC workloadsIntelMichael Moretti This is a high level introduction to Intel's view of HPC and the technologies that support it. Products including many core processors and our new OmniPath fabric.

Keywords: SIMULIA, HPC

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SIMULIA CUSTOMER PRESENTATION ABSTRACTS

Axial Impact Analysis of Fuel Aseembly FOR PGSFRKorea Atomic Energy Research InstituteHYUN SEUNG LEE The Korea Atomic Energy Research Institute (KAERI) has been developing the Prototype Gen-IV Sodium-cooled Fast Reactor (PGSFR). A fuel assembly is the main component of SFR and must maintain structural integrity because it has contained fuel rods. The objective of this study is to predict the dynamic behavior of a fuel assembly structure. A finite element analysis method predicts the axial impact behavior on a fuel assembly and is established by using the commercial code Abaqus. Boundary conditions are applied in the model to simulate the actual core condition such as receptacle and grid plates.

Keywords: SIMULIA, Dynamics & Shock

Quality Control of Pipe Lay and Riser Dynamic AnalysisLse Design IncLuca Suschitz, Lee Taylor, Travis Matula The increasing frequency in the use of Engineering Criticality Assessments (ECA) to determine weld quality in the installation of offshore pipelines and risers has put an increased focus on the importance of accurate predictions in dynamic stresses during installation and service. Over-predictions impose constrains to the installation campaign with high cost and safety implications. The response predictions of a pipe profile suspended from a vessel in random sea state with environmental loading and interaction with the seabed is a complex nonlinear problem. From a dynamic structural in place perspective the pipe catenary presents a near continuous spectrum of frequencies and modes of vibration. This has important dynamic numerical and structural relevance, implying excellent resonance transmissibility for any input forcing oscillation frequency. The numerical work used to represent the physical structural system present a tendency to amplify its response. It is well diffuse in the analytical community that common dynamic software present unreasonable high dynamic amplification factors. This work proposes an Abaqus based approach to calibrate appropriate damping. Provisional the software implementation, it is clear that the generalized effective parasite forces acting in phase with the velocity of the structure is key to the ultimate response in the dynamic analysis. When a simple cantilever beam is left oscillating to rest after an initial deflection in water or air medium, many of the software would over predict largely the total number of oscillations. When a pipe was dropped to rest on the seabed many software unrealistically counted several bounces indicating not accurate pipe soil dynamic interaction set up. The methodologies and toos set forth in this work are extendable to a variety of mechanical subsea component. The predictions reflected a rigorous process involving several iterations to validate predictions with numerical work reflecting a true of pipe response. This paper has offered improvement the quality control methods used to debug dynamic lay predictions with a view to increasing Project offshore workability and ultimately Project profitability which is greatly needed to make deep water and offshore oil and gas cost competitive with lower cost onshore reserves.

Keywords: SIMULIA, Assemblies, Contact & Impact Mechanics, Durability & Fatigue, Dynamics & Shock, Multi-body Dynamics and Systems Engineering, Simulation Lifecycle Management

Analysis of Clothing Pressure on the Human Body in MotionMechanical Design & Analysis CorporationTakaya Kobayashi, Yasuko Mihara, Yumiko Isogai, Sonoko Ishimaru, Chisato Nonomura The comfort provided by clothes directly affects the human psychology as well as physiology in all environmental conditions. The primary elements that contribute to comfort include the temperature and humidity conditions inside the clothes, which are referred to as the micro-climate within clothing; the clothing pressure generated when the human body is pressed under clothes; and the feeling of clothing, which is largely influenced by fabric. Among these elements, the benefits of pressure from clothing are comfort, as well as improvements in exercise skills, reshaping of the body, and medical changes in the autonomic nervous and circulatory systems.

In a previous study, the authors presented the development of knitted fabric models for finite element analysis to simulate the large deformation behavior of garments and clothing pressure distribution on the human body in a stationary position. For the modeling of cloth materials, two analytical approaches were investigated: a rebar layer model combined with isotropic hyperelastic shell elements and an anisotropic hyperelastic material model with a polyconvex strain energy function defined by the user subroutine UMAT. These material models were implemented in S4R, the four-node shell element of Abaqus/Standard. This paper describes an extension of the investigation to a

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study of the human body in motion. The study accomplished a fully automatic simulation of the clothing pressure change in T-shirts during jogging. The analysis technique is expected to be utilized in the development of a stabilized electrocardiographic measurement for a person during exercise.

Keywords: SIMULIA, Material Modeling

A Hyperelastic Visco-elasto-plastic Damage Model for Rubber MaterialsMechanical Design & Analysis co.Kai Oide, Takaya Kobayashi, and Junji Yoshida In designing a kinetic mechanism for modern complex structural members including a rubber device, it is of technical importance to improve its accuracy in predicting the inelastic cyclic behavior of rubber materials. A simple term like

“dynamic spring constant” is no longer enough to describe advanced industrial applications. This paper describes our experimental investigations and numerical simulations of the dynamic characteristics of rubber materials. The experimental dynamic responses, with strain amplitude, temperature dependence, or frequency dependence, were provided by simple shear test specimens as well as automotive rubber bushings. The vibration test was performed by a shaking table with a sufficiently large load capacity for the frequency range of up to about several tens of Hz. Reflecting the experimental results, a combined visco-elasto-plastic and hyperelastic damage model was implemented in a user subroutine of UMAT in Abaqus, which enabled representations of the visco-elastic, elasto-plastic, Mullins effect, and energy absorption performance of rubber materials. One of our aims is an application of the results of investigations by the material-modeling working group of JANCAE (Japan Association for Nonlinear CAE). The working group sprang from the idea of providing a multidisciplinary forum for rubber researchers, design engineers, and software engineers through the medium of advanced finite element codes, including Abaqus. This paper also briefly describes JANCAE activities.

Keywords: SIMULIA, Material Modeling, Optimization

Simulation of Caulking Process using Abaqus/ExplicitMercedes Benz Research and Development Indiaseshadri vasudevan, Madhu Dama, Vijendra Sharma This paper showcases the capabilities of Abaqus/Explicit solver to simulate and solve problems involving huge plastic deformation due to caulking process. Caulking is a mechanical joining process achieved by plastically deforming a material in order to hold another material. This method is in research phase and being examined by engineers at Daimler and University of Erlangen-Nuremberg (Germany). This technique is mainly used in Permanent Magnet motors to hold the magnets in the rotor stacks. The process involves punching operation by a tool on the laminates to plastically deform them thereby locking the magnets in their position. The caulking operation was successfully simulated using Abaqus/Explicit for Required load cases. The objective of the simulation was to find optimum tool geometry, depth of tool penetration and location of penetration for caulking process. The optimal tool geometry & location is identified for positive locking of magnets in the rotor slots and optimum depth of penetration is decided based on stress in the magnet. It was observed that the Abaqus solver was more robust than LS-Dyna in terms of solvability and simulation time. The results were found closer to test data in terms of force achieved for optimal depth of caulking, stresses in the magnet and the displacement pattern in the laminates. The best combination of Tool profile, position and depth of caulking tool to lock the magnets in their position without damaging them was suggested to design team well in advance. This illustrates the effectiveness of numerical simulations, helping the designers in reducing the need for actual test bench with numerous high cost fabricated hardware setup and thereby saving huge R &D cost and time.

Keywords: SIMULIA, Assemblies, CAD Integrated Analysis, Contact & Impact Mechanics, Design Optimization, Manufacturing

FEA Prediction of Off-Road Tire Temperature DistributionMissouri University of Science and Tech, Rolla, MOWedam Nyaaba, Samuel Frimpong, Godfred Somua-Gyimah, Grzegorz GaleckiExcessive heat generation and retention in dump truck tires is among the most common causes of tire removal in the surface mining industry. Accurate prediction of an operating tire temperature profile will involve the use of advanced numerical models and solution schemes to mimic the complete elastomeric materials response to operating conditions. The internally generated heat in a tire is a function of its viscoelastic energy dissipation during rolling. Previous research studies have inaccurately predicted off-the-road (OTR) tire heat generation rates and

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temperatures by the use of linear viscoelasticity to approximate the rather nonlinear viscoelastic rubber material. This paper presents an accurate approach to predicting OTR tire temperature distributions taking into account the true mechanical response of the filled rubber compounds used in tires. Rubber nonlinear viscoelasticity has been modeled using the recently implemented parallel rheological framework (PRF) in Abaqus. Stress relaxation test data for two regional compounds (tread and carcass) have been used to calibrate the PRF material model parameters using the data matching component of Isight. A fully coupled thermal-stress analysis procedure in Abaqus/Explicit was adopted to compare temperature distributions of a typical Michelin 59/80R63 tire modeled using two material models: (i) linear viscoelasticity, and (ii) nonlinear viscoelasticity. The results obtained show that tire temperature distributions are accurately predicted from the PRF material model.

Keywords: SIMULIA, Tires

Automated Framework to Predict Field Failure Rate for Handheld Electronic DevicesMotorola Mobility LLCManish Maheshwari Consumer handheld devices are constantly subject to mechanical abuse like everyday drops, scratches, bending, environmental and thermal exposure is to name a few. Most electronic device manufacturer try to estimate field failure rate (FFR) and warranty cost using accelerated life-cycle testing for most of the everyday abuse. However limited time and smaller sample sizes leave them with large statistical variation in failure counts and thus results in large variation in final estimates of FFR and warranty cost. Advancement in numerical simulations capabilities, speed and quality has helped replace most physical tests with mechanical simulations. Using the data from simulations can be used to predict FFR more accurately; however that requires large number of simulations to cover most of the variation in designs, and load variations. Author has developed an automated framework using iSight and python scripts that can design the load cases, submit simulations with design and load variations, collect results from simulation result files and run the statistical analysis to produce FFR for specified component for given load cases.

Keywords: SIMULIA,

Analysis of 3D Steel Concrete Composite Buildings using AbaqusNational University of SingaporeJeyarajan Selvarajah, J Y Richard Liew Research on progressive collapse analyses of steel-concrete composite building structures has been performed over the last two decades with few simplifications in composite building frame components. This is because the detailed modelling of the nonlinear behavior of steel-concrete composite slabs and joints is rather tedious and involves interaction between floor beams, slab and beam-to-column joint behavior. Past research on progressive collapse analysis of building frames has reported that full three-dimensional (3D) building frame analysis is computationally expensive and consumes substantial computational resources in order to predict the non-linear dynamic response of buildings. Although well-calibrated simplified plane frame models can be relied upon to model progressive collapse, the results obtained from plane (2D) frame analyses may not be conservative. The main objective of this research study is to develop efficient computational models using Abaqus to capture the behaviors of steel-concrete composite building structures subject to extreme load. The proposed composite slab model avoids complex geometric modelling of metal deck profile, concrete profile and shear stud, and it requires less computational time for analyzing large building framework. The proposed joint model using Eurocodes avoids detailed finite element modelling of joint components such as bolts, gap, bolt-hole size, plates, etc., to improve the computational efficiency of analyzing large three-dimensional (3D) building frames. The incorporation of semi-rigid joints and composite slabs in 3D frame analysis tends to produce more realistic estimate of frame behavior compared to model using pin or rigid joints or skeleton frame.

Then, using the proposed numerical models, variety of moment and simple braced frames were investigated using conventional alternate path approach and direct blast analysis to evaluate their progressive collapse resistance. Abaqus shall be adopted by researchers and practicing engineers to investigate the real response of 3D building frame.

Keywords: SIMULIA, Buckling & Collapse

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Modeling of Wave Propagation Through Soft Electrically Tunable MetamaterialsNaval Undersea Warfare CenterMichael Jandron, David Henann This talk will present numerical simulation capability, developed within the Abaqus/Standard environment, for modeling steady-state wave propagation through soft dielectric elastomer composites. Specifically, the discussion will include (a) a nonlinear user-element subroutine (UEL) to simulate the coupled electric-displacement response of these soft materials, (b) a user MPC subroutine to enforce complex-valued Bloch-Floquet constraints, as well as to impose appropriate updated Lagrangian boundary conditions on the representative volume element (RVE), and (c) a method within the UEL to lower the dispersion error in the solution by modifying the mass matrix. Through the combination of these methods, it is possible to study how the application of an electric field to these materials results in opening and closing of phononic band-gaps, that is, frequency ranges in which propagating waves through the dielectric elastomer composite are not permitted. This modeling framework is useful to guide the development phononic metamaterials that cannot be analyzed analytically and leverages the computational backbone of Abaqus/Standard, which enhances portability and maintainability of our modeling approach. We envision using these electrically-tunable phononic metamaterials to provide vibration isolation for undersea structures. This work is supported through the Naval Undersea Warfare Center In-house Laboratory Independent Research (ILIR) program.

Keywords: SIMULIA, Dynamics & Shock, Material Modeling, Noise, Vibration & Acoustics

Topology Optimization of a Lacrosse HeadOptimal DeviceRob Stupplebeen Like many industries the balance between cost, stiffness, strength and weight is critical in sports equipment. This study goes through the methodology to perform topology optimization with Catia (CAD), Abaqus (FEA), Tosca (Topology Optimization) and Simpoe (Injection Molding). Topology optimization evolves the geometry to remove unneeded material effectively minimizing weight and maximizing performance. This is carried out by automatically scaling individual element's density and stiffness based on the stress state of the previous simulation. This is an iterative process where material flows to regions to satisfy constraints and minimize the objective function.

Keywords: SIMULIA, Composites, Contact & Impact Mechanics, Design Optimization, Manufacturing, Material Modeling, Optimization, Process Automation

Virtual Modeling's Role in Improving Impact Performance of Plastic ContainersPlastic Technologies, Inc.Sumit Mukherjee The packaging industry is on the brink of process changes including manufacturing, materials and their applications. New concepts are being born via computer screens and virtually nurtured to create commercially-viable packages. This is taking place before ever touching the mold, creating an actual package or conducting a physical test. It’s important to understand various aspects of processing, material properties, package design, product characteristics, as well as specifications and performance parameters that need to be met. Design guidelines have matured to the point where “moldable” geometry is part of the CAD software intelligent database. This helps take concepts, convert them to viable production ready designs and provide a degree of confidence that the package can be manufactured. However, the output from this stage does not tell us whether or not a specific performance characteristic, such as improving the drop impact performance, has been achieved. This is where the second component of virtual modeling comes into play. The intricate CAD geometry can be manipulated to add further definition regarding thickness and material properties.

This presentation focuses on interplay between design and material distribution to help improve container performance. Extrusion blow molded containers derive their thickness distribution from the parison shape which is the precursor to the blown bottle. Challenges exist with ideal thickness distribution (economics vs. optimal performance) hence filling; packing and distribution studies need to be undertaken using simulation techniques. They can predict whether or not the part can be blown with optimal thickness distribution and geometry that will help, for example, absorb the resulting stress after being dropped without rupturing.

Keywords: SIMULIA, CAD Integrated Analysis, Design Optimization, Material Modeling, Optimization, Packaging Performance Simulation, CPG Drop Testing

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Optimised Design of Foundations for Wind Turbine TowersPrincipiaJavier Rodriguez, Luis Lacoma, Francisco Martinez, Joaquin Marti Environmental, political, and other considerations are leading to the installation of growing numbers of wind turbines for electricity generation. This paper concentrates on onshore installations, in which the turbine is at the end of a tower founded on the ground. Problems in the foundation or its connection to the tower may entail a global failure. A worrying percentage of the towers built before 2010 is ill designed, often with obvious manifestations. On the other hand new designs attempt to optimize material quantities and costs while providing an adequate response. Principia has gathered considerable experience in both the identification and remediation of the problems of older foundations and the optimization of new designs. The paper sets the key considerations to be kept in mind when conceiving those structures. It also illustrates with real examples the shortcomings of some foundations, describing their remediation measures, and the aspects that govern the foundation with a view to its optimization. The problem is particularly suitable for numerical simulations with Abaqus and this paper provides the necessary concepts and methodological approach. More specifically, the concrete geometry is meshed with solid elements. Surface elements including rebar layers are embedded. Other parts like the steel cylinder, welded studs, anchorage bars, etc. are also included. The concrete behavior is described with the concrete damaged plasticity model. Explicit integration is used because of the strong nonlinearities caused by concrete cracking and crushing. The methodology allows assessing the suitability of the design for ultimate, serviceability and fatigue limit states.

Keywords: SIMULIA, Buckling & Collapse, Material Modeling

Stiffness Mapping in Biological Materials Based on MRI Imaging and Topology OptimizationPurdue UniversityLuyao Cai, Claus Pedersen, Ross McLendon, Manuel Biedermann, Gergana Dimitrova, Jiang Yao, Magnetic resonance imaging (MRI) is a preeminent technology to visualize the internal tissue structure, in addition to other physical phenomena like flow and diffusion. One specialized MRI technique, termed displacements under applied loading by MRI (dualMRI), was developed to measure displacements and strain in musculoskeletal tissues, hydrogels, and engineered constructs. However, deformation information does not directly describe spatial distributions of tissue stiffness, which is critical to the understanding of disease progression. In order to achieve this goal, we proposed an inverse modeling approach based on Tosca and Abaqus to map the internal stiffness nondestructively from image-based displacements measured in different biological constructs. In this study, the inverse simulation was validated on displacements results derived from forward simulations where materials properties and boundary conditions were known. With different level of noise added, the error associated with the relative stiffness mapping technique was studied and the optimized smoothing technique was chosen. To analyze the effects of each parameters in the inverse modeling process, sensitivity analysis was done using Cotter's method. Additionally, experimental data from bi-layered agarose gel under different loading conditions were modeled, with plane stress assumption in two dimensions. The significance and potential of this approach was highlighted for the description of tissue degeneration, repair, and complex material properties.

Keywords: SIMULIA, Biological Modeling

Ductile Tearing Instability Assessment of a Cracked Reactor Pressure Vessel Nozzle for Larger Critical Crack Size Compared to the FAD MethodQuest Integrity GroupGreg Thorwald, Joyce Wright The objective of this paper is to evaluate a cracked nozzle in a reactor pressure vessel using a ductile tearing instability assessment. A material resistance J-R curve and elastic-plastic finite element analyses (FEA) are used to evaluate crack stability and obtain a critical crack size. The expectation is that the critical crack size will be larger from the tearing instability assessment compared to a typical Failure Assessment Diagram (FAD) assessment, since the rising J-R curve gives higher toughness as stable tearing occurs. Both the tearing resistance and FAD assessments are described in the engineering best practice standard API 579-1/ASME FFS-1. A reactor vessel nozzle geometry with a postulated surface crack is used as an example to examine the analysis details and common difficulties encountered when creating the crack model, obtaining the necessary elastic-plastic FEA convergence using Abaqus/Standard to compute the J-integral values, and determining the tearing stability point. The non-dimensional tearing modulus plot provides a definite identification of the stability point, which leads to the critical crack size. The reason for easier elastic-plastic convergence for a tearing stability assessment than for an FAD assessment is discussed. Engineers

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using Abaqus benefit from elastic-plastic FEA of 3D crack meshes by computing the J-integral values needed to assess cracked structural components. When a J-R resistance curve is available, a ductile tearing assessment can provide a larger critical flaw size, which could justify reducing or delaying inspections, and could allow for a longer service life in cyclic fatigue before repair or replacement is needed.

Keywords: SIMULIA, Durability & Fatigue, Material Modeling

Fracture Mechanics and 3D Crack Mesh Analysis Software. Assessing damaged structures relies on fracture mechanics procedures in engineering standards and frequently finite element analysisQuest Integrity GroupGreg Thorwald The variety of damage conditions and complexity of some assessment procedures can make even a basic assessment tedious and impractical. SignalTM Fitness-for-Service from Quest Integrity covers procedures in the current API 579/ASME FFS 1 standard and evaluates a variety of damage: metal loss, pitting, and cracking. Crack-like flaws can be evaluated using the Failure Assessment Diagram, parametric, and Monte-Carlo methods to obtain limiting crack sizes and limiting load cases. Growing cracks can be evaluated using fatigue and/or creep analysis. Stress profiles from Abaqus FEA can be used as the loading input. For a more detailed cracking analysis, crack meshes with a range of crack sizes are usually needed. However, generating crack meshes in complicated geometries may take too much time to be practical, so detailed fracture and/or fatigue crack growth analyses are not always conducted. FEACrackTM helps engineers generate crack meshes and ready-to-run Abaqus input files quickly and easily, even in complicated structures, to compute the stress intensity and J-integral along the crack front. A user-defined geometry method generates 3D crack meshes in arbitrary volumes, and the fatigue crack growth module, which can be used with Abaqus sub-modelling, uses a re-meshing method to update the crack size for each increment of growth. Using Signal FFS and FEACrack allow asset operators to determine the condition of damaged structures with precision and make confident asset management decisions. Engineers benefit from improved solution accuracy and better crack assessments.

Keywords: SIMULIA, Crack, Failure Assessment Diagram, Monte-Carlo Methods, fatigue analysis, creep anaylsis

Design and Test of a Canard for a MissileRoketsan Missile Ind.Ali Yetgin, Bulent Acar Canards are frequently used control surfaces to steer missiles in the air. They are positioned at relatively forward sections of the body. Considering the mechanical and thermal loadings during the flight of a missile, design of a canard is a challenging process. Guidance of the missile to its target relies on these control surfaces. In case of a malfunction or damage on the structure of it, missile cannot fulfill its mission. Therefore they are crucial components and on critical design path. Canard system which consists of aerodynamic control surface and a rotating base must withstand aerodynamic loadings and rotate within predefined angles to produce steering action. Necessary rotation movement may be provided by mechanical or hydraulic actuators. In this study, canard body and its connection to rotating base were modelled in Abaqus/CAE. Detailed finite element model of bolted connection was created and thermo mechanical strength analyses were performed. Different bolt configurations and loading varieties were analyzed in order to ensure adequacy of the design. Safety of the system was calculated against applied aerodynamic pressure and thermal loadings. Experimental study was conducted in order to obtain ultimate loading of the system. Finally analyses were verified using various measurements during tests such as strain and displacement. At the end of study a good correlation was obtained between analysis and test results.

Keywords: SIMULIA, Assemblies, Contact & Impact Mechanics, Manufacturing

ASME Cyclic Creep Evaluation of Critical Piping Component using CREEP Subroutine and ORNL Test DataSaba Metallurgical and Plant Engineering Services, LLCBrent SabaA critical piping component was to be exposed to a new cyclic operation, where parts of the new cycle would exist in the creep regime for the Alloy 800-H(T) material. FEA using Abaqus was employed to determine the expected safe life of this component due to the combined effects of fatigue cycles and creep. Providing accurate modeling of the creep process of the Alloy 800-H(T) was crucial to obtaining reliable equipment life prediction. Therefore, raw test

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data and curve fitting data for 800-H material from Oak Ridge National Laboratory (ORNL), covering a wide range of plate thicknesses, applied loads, and duration, was used to develop a CREEP Subroutine. An elastic-plastic-creep multi-cycle simulation was created, using this CREEP subroutine. Evaluation of this cycle simulation was based on ASME Section III-NH (High Temperature Nuclear Code) Rules. Low cycle fatigue is based on maximum strain range and Code fatigue curves. Extent of creep is determined using an averaged maximum equivalent stress with relation to Code creep time-to-rupture stress values. Creep fatigue interaction is based on Code Damage Equation and a Code designated total creep-fatigue damage degradation factor. The creep contribution was determined to be nil, only adding its effect to the degradation factor. The number of cycles was determined to be acceptable for a life of 25-years based on the current number expected cycles per year. This piping component has been installed and operating for nearly three years. Recent inspection revealed no adverse conditions. Previously unavailable, the client now has reliable data.

Keywords: SIMULIA, Durability & Fatigue, Material Modeling

A Finite Element Model of the Intervertebral DiscSaint Louis UniversitySheila Buswell, Gary Bledsoe, Scott Sell, Natasha Case Intervertebral Disc (IVD) Degeneration causes pain and movement restrictions in the majority (60%) of people during their lifetimes. The development of approaches for IVD arthroplasty is hindered by the insufficient understanding of the load requirements and the material properties of the IVD. Computational modeling is one approach that can be used to explore connections between IVD loading, properties, and disc degeneration. However, computational approaches utilize a finite element model (FE) that oversimplifies the construction of the IVD. The annulus fibrosis (AF) is often modeled as an isotropic material with consistent material properties throughout. Computer models of the IVD are typically validated against mechanical testing of isolated vertebral segments. Although the computer models can replicate the failure mode produced by in vitro mechanical testing, these models are limited in predicting in vivo degeneration and do not recreate the yielding and peripheral bulging of the IVD that occurs with progressive degeneration. The aim of this study was to develop an FE model of the IVD that replicated the in vivo failure modes experienced clinically. The model created in this study utilized four distinct materials - the cartilaginous end plate (CEP), Nucleus Pulposus (NP), and two distinct layers of the Annulus Fibrosis (AF) - to represent the constituents of the IVD. The geometry of the model was based on average dimensions provided by computerized axial tomography. Material properties were assigned to each component based on published values from the literature. The model was validated by comparison to force/displacement data from mechanical testing. The SOLIDWORKS FEA Model was validated by an Abaqus static FEA.

Keywords: SIMULIA, Biological Modeling

Spherical Indentation Cracking in Brittle Materials: An XFEM StudySogang UniversityKaruppasamy Pandian Marimuthu, Felix Rickhey, Jin Haeng Lee, Hyungyil Lee This work aims at characterizing the formation of cone-cracks in brittle materials upon spherical indentation. The cone-cracking is simulated by the extended finite element method (XFEM) in Abaqus / Standard. The element size-dependency is reduced by scaling the damage initiation strength based on mean stress criterion and calibration techniques. The formation of a kinked-cone-crack is observed when the indenter comes into (second) contact with the surface part outside the ring crack. After analyzing the effects of friction, Poisson's ratio on cone-crack evolution, a database for enhanced Roesler's constant kappa c| kink, which considers the effect of cone-crack-kinking, is provided by performing systematic XFE analyses. This database can be used for the fracture toughness evaluation in brittle materials.

Keywords: SIMULIA, Contact & Impact Mechanics

Stratasys’ Additive Manufacturing Solutions StratasysPeter SecorStratasys manufactures 3D printing equipment and materials that create physical objects directly from digital data. Its systems range from affordable desktop 3D printers to large, advanced 3D production systems. Additive manufacturing technologies include FDM and PolyJet. Stratasys is the leader in developing versatile tools for innovative applications.

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This presentation will deliver an overview of the Additive Manufacturing /3D Printing Market and it’s evolution- exploring the solutions and benefits realized by using these tools in manufacturing, entertainment, education, dental, automotive, aerospace and more.

Keywords: SIMULIA, 3D Printing, Additive Manufacturing

Abaqus Scalability for Small and Medium Size ProblemsTEN TECH LLCWilliam VILLERS We will present and discuss the benefits of multi-CPU and GPU computing with real life application and comparative results. While preparing an Abaqus pricing configuration for a customer, we wanted to have a clear view of how much benefit GPU Computing in Abaqus 2016 would bring. The goal of the study was to make sure we delivered the best bang for the buck in terms of solver execution speed to the customer. Unlike a lot of the benchmark data published using enormous dynamics models, it was desired to create a more \down to earth\" one that would be more representative of what customers could use Abaqus for. These published benchmarks are a great illustration of the incredible scalability of Abaqus but is anything gained if there is not a 40M dof model with 2500 modes to calculate? A relatively small model (3M dof) was put together and tested with both linear statics and non-linear statics analysis with Abaqus 2016."

Keywords: SIMULIA, Cloud Computing, Contact & Impact Mechanics, Noise, Vibration & Acoustics

Numerical and Experimental Study on the High Strain Rate Deformation of Tubes for Perforating Gun ApplicationsTenaris Dalmine SpADavide Gallina, Mihaela Eliza Cristea, Riccardo Cavallet The perforating guns are systems subjected to intense, impulsive pressure loading resulting from the detonation of shaped charges loaded in the inner pipe. Upon detonation, the charges are responsible for different significant damaging loading mechanisms such as during jet perforation, case fragment impact and explosive blast. It is usually desired that a gun carrier tube survives the perforation event without excessive swelling, cracking, catastrophic rupturing (i.e. splitting) or fragmentation. Its survivability is a major consideration in perforating system design and manufacture. In this work, a numerical-experimental study aims to better understand the loading rate and damage mechanisms involved on the carried tube, as well as the local deformation response of the full scale component when loaded under real loads are presented. The numerical model is based on a multiple (three) shape charges analysis fed by real tube and shape charges geometries as well as carrier tube material curve at high strain rate similar to the real event. An explicit multi-material Coupled Eulerian-Lagrangian (CEL) model that simulates the sequential shaped charges detonation has been developed, the results in terms of local deformation of carrier tube has been then compared with experimental data obtained from instrumented full scale tests.

Keywords: SIMULIA, Assemblies, Contact & Impact Mechanics, Dynamics & Shock, Material Modeling

The Journey to Meet P&G's Needs for Democratizing and Managing Simulation via the 3DEXPERIENCE V+R Process ApplicationsThe Procter & Gamble CompanyKrista Comstock Modeling and Simulation is a key enabler for driving Procter & Gamble’s superior brands and products. Modeling & Simulation is “growing up” within the development processes. Before, modeling may have provided direction into a final physical experiment which would be documented and used for a decision. Today, simulation is becoming how we learn, as well as that final test from which key decisions are made. This brings with it the responsibility that the data should be retained and documented in similar ways to how physical methods have been captured for reproductibility. P&G also has a strategy to democratize simulation to non-experts through simplified interfaces and apps. Singularly, these systems have been very costly to create and maintain. A scalable solution is required to make this goal attainable. Any solution for P&G must consider our wide breath of simulation disciplines and global footprint of users and experts. The ability to retrieve and reuse our models requires a federated solution. The journey to meet these needs has centered on a partnership with SIMULIA to meet our Simulation Process & Data Management needs. P&G went through an extensive process of gathering requirements and then partnered with SIMULIA for these to be delivered within the 15x3DEXPERIENCE platform. A platform is only half of the solution, driving adoption through

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culture change & deployment strategies are equally important. This presentation will focus on the journey P&G has traveling and the successes we are seeing as 15x3DEXPERIENCE Process Applications is deployed.

Keywords: SIMULIA, Process Automation, Simulation Lifecycle Management

WAimat Suite – Advanced Material Failure ModelingThornton Tomasetti Weidlinger Applied ScienceBadri HiriyurWe present WAimat Suite – a modular software suite developed by Thornton Tomasetti-Weidlinger Applied Science (TT-WAS) to facilitate efficient, high fidelity advanced material modeling for industrial applications. WAimat was developed on the basis of fundamental research undertaken at the Weidlinger Applied Science practice of TT, in support of several multi-year Office of Naval Research programs. These projects resulted in the formulation of new types of constitutive models that combine the state of the art in applied science and engineering with the computational efficiency necessary for industrial applications. Following a rigorous formulation and validation process, these constitutive models were implemented into Abaqus/Explicit, and deployed as three modules: WAidam, WAifire, and WAimc2. WAidam is a ductile-fracture prediction module which represents the cutting edge in ductile-fracture mechanics for large-scale shell structures. WAidam features a three-invariant plasticity model that accounts for dependence of the strain at fracture on both stress triaxiality and the third invariant of the deviatoric stress, which has a significant influence on shear-dominated fracture. WAidam achieves high levels of accuracy in fracture prediction while maintaining discretization levels and computational efforts that are realistic for structural applications. WAifire is a thermomechanical constitutive module for predicting fire and other high temperature effects on structures, including their residual capacity. It focuses on large-scale structures and their response to transient dynamic loading conditions. WAifire was developed on the basis of a comprehensive viscoplasticity model embedded in the shell mechanics framework. It is unique in its ability to represent both creep deformation and fast dynamic response to impulsive loads, in contrast to empirical creep models. WAifire delivers a consistent approach to assessing structural response to extreme thermomechanical loads with widely varying stresses, temperatures, and strain rates. WAimc2 allows the user to calibrate the WAidam and WAifire models, as well as other commonly used material models available in Abaqus/Explicit, to experimental test data. In addition to model calibration, WAimc2 serves as a data repository and an uncertainty quantification platform. Past, present, and future material fits can be compared, uncertainty quantification metrics can be calculated, or the database can simply be used to organize a library of material fits and associated test data.

Keywords: SIMULIA, Material Modeling, Ductile-Fracture Mechanics, Viscoplasticity, Creep Deformation

Private and Public Cloud High Performance Computing for CAE Simulation: Benefits and Challenges TotalCAERodney MachIn this session you will learn how companies are taking advantage of the latest trends in High Performance Computing to accelerate the SIMULIA portfolio including Abaqus, fe-safe, and Isight. Case studies will cover HPC clusters, Remote Visualization, Cloud Computing, CAE backups in the Cloud, and other IT solutions that companies are utilizing to make engineers more productive. The presentation will focus on customer case studies that show real-world solutions to engineering challenge

Keywords: SIMULIA, HPC, Remove Visualization, Cloud Computing, IT Solutions

Z-set to Abaqus: Efficient Tools for Advanced Material Modeling, Damage Analysis and 3D Crack Propagation SimulationTranvalor S.A.Nikolay OsipovTransvalor S.A. is a software and engineering services company, specializing in development and integration of numerical simulation codes. Transvalor transfers research results, mainly software packages, from leading French research institutions (MINES ParisTech and ONERA) to industry. Since 1996 Transvalor S.A. commercializes Z-mat for Abaqus - a library of constitutive models for plasticity and viscoplasticity with robust integration methods and advanced coefficient identification procedures. The actual package of integrated solutions provided by Transvalor helps customers to solve challenges ranging from material modeling and parameters' calibration to fatigue life estimation and 3D crack growth simulations. In the first part of the talk we will go through the presentation of the Z-set products and its interfaces with Abaqus. In the second part some examples of application of our products for the

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solution of industrial tasks in the field of thermomechanical fatigue will be presented. Particular focus will be given to the 3D cracks propagation simulations.

Keywords: SIMULIA, Plasticity, Viscoplasticity, Crack Propagation

Heavy Duty Structural Analysis using Abaqus in the CloudUberCloudWolfgang Gentzsch, Frank Ding The UberCloud engineering cloud community started its life in July 2012, with its very first engineering cloud experiment, which explored challenges and their resolution in the cloud. The end-user then was Frank Ding from Simpson Strong-Tie (Simulating steel to concrete fastening capacity for an anchor bolt) who worked with cloud provider, Nimbix, and software provider SIMULIA. In 2013, we introduced cloud mentors and repeated experiment one, now as Team 47. There was no surprise that that this cloud experiment finished successfully within one month compared to the three months of the first experiment. Since then, over 200 industry cloud experiments have been performed.

Based on the experience gained from these experiments, we have developed novel software container technology which enables easy packaging of software and easy access and use of containerized application software on workstations, in-house servers, and on any in-cloud computing resources. Now, three years later, these cloud experiments take less than a week and often finish within one day.

In this presentation, we will present this use case about simulating steel to concrete fastening capacity for an anchor bolt in the cloud with Abaqus. We will highlight the novel software container technology and how this is dramatically simplifying computing in private and public clouds and provide lessons learned and recommendations for our engineering community.

Keywords: SIMULIA, Assemblies, Cloud Computing, Contact & Impact Mechanics, Design Optimization, High Performance Computing, Material Modeling

Investigation on the Influence of Geometric Parameters of Rectangular Cross-Sections on Buckling of the StructureUnited Arab Emirates UniversityNeha Arieckal Jacob, Sangarappillai Sivaloganathan The effect of cross-sectional parameters on the local buckling behavior of a rectangular hollow section (RHS) under lateral compression is examined in this study through finite element modeling and optimization. The finite element model was first validated against experimental data. With good agreement observed between the experimental and FEA results, the validated FEA model in Abaqus was used in conjunction with Isight to conduct an optimization study and examine the influence of cross-section parameters on the buckling behavior of the section. Cross-sectional parameters considered included the aspect ratio of the section, the thickness to width ratio of the web and the thickness to width ratio of the flange. For a target buckling load and given definite ranges of the width, height, flange thickness and web thickness, the best combination of parameters was arrived at using the optimization software Isight.

Keywords: SIMULIA, Buckling & Collapse, Optimization

A Nonlinear Model for Studying the Interface’s Behavior Bloc/Mortar in a Heritage Building and Numerical Modeling by AbaqusUniversité Hassan 1er FSTSHicham FIHRI FASSI This research work follows our first work presented in Simulia 2015 [1] about the modeling the mortar-block assembly for analyzing the potential occurrence of mechanical problems at interfaces as the consequence of an eventual incompatibility. The study considers a heritage building located in Morocco. In this recent study the authors test the effect of non linear behavior of materials and interface. The goal of the modeling works is to compare the repartition of internal solicitations between the original situation and the restored one in order to quantify the risk, for materials that should be conserved, associated with the œstress shieldingphenomenon and to justify the particular attention to be paid for the choice of a specific mortar for interventions to be carried out on the concerned building. An elastoplastic model including contact with friction is used. One concrete numerical example using Abaqus code will be treated and showed on this paper.

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[1] H. FIHRINFASSI and all; Study of mechanical compatibility at the mortar-block interface in a heritage building and numerical modeling by Abaqus Simulai 2015.

Keywords: SIMULIA, Material Modeling

Modeling Natural Fracture Activation Using a Poro-elastic Fracture Intersection ModelThe University of Texas at AustinMahdi Haddad, Kamy SepehrnooriPre-existing natural fractures in a hydrocarbon reservoir complicate the hydraulic fracture growth and consequently, the microseismic event interpretation. Due to the misalignment of the natural fractures with respect to the far-field principal stresses, shear slippage is introduced as a failure mode or microseismic source along natural fractures. This failure mode, however, leaves a concern about the connectivity of the induced fracture network in order to enhance hydrocarbon production. A poro-elastic fracture intersection and propagation model can rigorously address this concern.

Our numerical technique develops fracture intersections based on Pore-pressure Cohesive Zone Model (P-CZM) along both hydraulic and natural fractures. This model honors the fracture tip effects in quasi-brittle shale and introduces middle edge pore pressure nodes which are now hydraulically coupled at the intersection using additional simple governing equations. The model also provides a reasonable solution for the slit flow in fractures, which is fully coupled with continuum-based leak-off on the fracture walls along with poro-elastic effects within the porous media. Moreover, a user-defined stability function along the natural fracture(s) distinguishes the potential regions for the occurrence of microseisms.

Using this model, natural fracture opening and shear slippage are investigated depending on horizontal stress contrast, adjoining fissure conductivity, and hydraulic-natural fracture intersection angle. Modeling results demonstrate the complexities of hydraulic fracture growth through the intersection with natural fracture such as selective branching and throttling at the intersection. Our fracturing simulations agree with the analytical criteria for fracture crossing or arrest at the intersection.

Keywords: SIMULIA, Geomechanics (Oil & Gas), Multiphysics & Co-simulation

Multi-Scale Modelling of Textile Reinforced Tissue Engineered Heart ValvesUniversity of Massachusetts LowellScott Stapleton, Deepanshu Sodhani, Varunraj Ramachandran, Ashish Sethi, Ricardo Moreira, Petra Mela, Transcatheter aortic valve implantation of fibrin-based tissue engineered heart valves with a tubular leaflet construct have been developed as an alternative to invasive traditional surgical heart valve implantation, but currently cannot withstand pressures found in the aortic position. To increase valve strength, a PET textile reinforcement has been introduced to the fibrin scaffold. However, care must be taken when using a textile reinforcement. Increasing reinforcement may increase the strength, but also increases stiffness which can interfere with the functionality of the valve, prohibiting full valve closure. In order to predict the behavior of the valve, improve design, and eventually optimize valve performance based by tailoring the textile reinforcement, a 4-tiered hierarchical multi-scale modelling framework has been created. The model includes an individual fiber scale model, two textile-level models, and a full heart valve model. Geometry generation based on microscopic images of the composite will be discussed, along with application of boundary conditions and loading application. Fitting the various material models based on homogenization of the smaller scale will be demonstrated. Finally, experimental validation and characterization at various scales will be discussed.

Keywords: SIMULIA, Biological Modeling, Composites, Material Modeling

Finite Element Thermal Crack Analysis of Prestressed Double Tee Canopy BeamUniversity of Tennessee at ChattanoogaWEIDONG WU, Tyler Haraway, Asritha Batchu, Ignatius Fomunung, Joseph Owino, Mbakisya Onyango, Nonlinear Finite Element Analysis is performed to investigate the crack of a pre-stressed double tee canopy beam due to thermal expansion. Concrete damage plasticity material model is employed to detect the potential crack of concrete beam caused by thermal loads. The bond between pre-stressed strands and concrete is modeled by tie, cohesive element and friction. Explicit modeling approach is selected due to the significant discontinuity in the three-dimensional model. The potential crack pattern from FEA modeling indicates the actual crack as observed in the field quite well.

Keywords: SIMULIA, Material Modeling

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High-velocity Impact Damage Modeling of Laminated Composites using Abaqus/Explicit and Multiscale MethodsUniversity of Zagreb, Faculty of Mechanical Engineering and Naval ArchitectureIvica Smojver, Darko Ivancevic The present work describes a multiscale methodology which has been developed for modeling of impact damage in the laminated composite structures. The methodology employs the High Fidelity Generalized Method of Cells (HFGMC) micromechanical model for the prediction of the local stress and strain fields, within the representative unit cell of the unidirectional composite material. The Mixed Mode Continuum Damage Mechanics (MMCDM) theory has been utilized to model damage within the composite unit cell at the micromechanical level. The MMCDM theory enables modeling of the microdamage nonlinearities at in-plane shear and transverse compressive loadings of the composite plies. Employment of the multiscale approach enables the application of the MMCDM damage model in structural analyzes.

Computations at the structural level have been performed using Abaqus/Explicit, whereas the link between the two distinct scales has been established by the VUMAT subroutine. The method uses an adaptive approach in which the micromechanical computations in the HFGMC-VUMAT subroutine have been called only at the material points in which damage effects are to be expected. The Puck's ply-based failure theory has been applied as the criterion initiating the micromechanical analyzes.

The methodology has been implemented in the high-velocity soft-body impact simulations at T300/914 CFRP composite plates. Results of the multiscale damage model have been validated using available experimental data and by comparison with the numerical results obtained using several ply level failure criteria and the Abaqus built-in damage model for fiber-reinforced composites.

Keywords: SIMULIA, Composites, Contact & Impact Mechanics, Material Modeling

Coupled Thermomechanical Forging Simulations and the Effect of Material Constitutive LawsVeryst EngineeringStuart Brown, Nagi Elabbasi, Eric Schmitt Correct hot forming design relies on accurate prediction of forming loads, material deformation, and material properties. This is particularly true for coupled thermomechanical analyses, where die/workpiece contact will change local deformations and temperatures. These strains and thermal histories can change the material microstructures and resulting product properties. This presentation examines the influence of different material and contact models within a hot forging simulation and discusses the consequences on ultimate product performance. We use rate-independent plasticity and compare the results with the Anand viscoplastic model available within Abaqus. We also use different contact conditions with varying pressure sensitivity for heat transfer. The simulations demonstrate that constitutive model selection has a strong effect on the final predicted properties of the forging.

Keywords: SIMULIA, Manufacturing, Material Modeling

Sloshing Analysis of Baffled Containers Using SPH MethodVeryst EngineeringAlireza Kermani, Dr. NAGI ELABBASI We used the smoothed particle hydrodynamics, SPH, approach in Abaqus/Explicit to simulate sloshing of a partially filled container for a consumer product application. We investigated the effect of fill level and acceleration on sloshing. Our results indicate that, for the severe impact conditions that we investigated, sloshing forces are proportional to the mass of fluid and do not scale with acceleration. We also compared the response of the containers with and without baffles and showed that the container we considered with conventional baffles experiences the lowest maximum stress during sloshing.

In this work we used the smoothed particle hydrodynamics SPH approach in Abaqus/Explicit to simulate sloshing of a partially filled container for a consumer product application. The simulation results show a significant difference in the stresses in the container compared to an empty container, and also compared to an approximate method of adding the fluid mass to a standard structural impact analysis. We also investigated the effect of several changes to the internal structure of the container aimed at reducing the effect of fluid sloshing.

Keywords: SIMULIA, Contact & Impact Mechanics, Dynamics & Shock

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Bond Model Development for Pretensioned Concrete Crossties with User Materials in AbaqusVolpe National Transportation Systems CenterHailing Yu, David Jeong Pretensioned concrete crossties are increasingly employed in railroad heavy haul and high speed lines. The bond between steel reinforcements and concrete affects several important performance measures of concrete ties, and bond modeling is a critical component in the analysis of concrete tie behavior using the finite element (FE) method. This paper summarizes the bond models developed at the Volpe Center for pretensioned concrete crossties and their implementation as user materials for cohesive elements in Abaqus. The bond models are macro-scale or phenomenological and developed within the elasto-plastic framework. The steel reinforcement-concrete interface is homogenized and represented with a thin layer of cohesive elements sandwiched between steel and concrete elements. Traction-displacement constitutive or bond relations are defined and assigned for the cohesive elements. The traction components are normal and shear stresses, and the displacement components are interfacial dilatation and slip. Elasto-plastic bond models for a smooth wire, three indented wires and a seven-wire strand commonly used in concrete crosstie production are presented with their respective elastic stiffness, yield function and plastic flow definitions. Calibration and validation of these bond models with experimental data are further described in this paper.

Keywords: SIMULIA, Composites, Material Modeling

Load Measurement and Linear Dynamics with Wolf Star TechnologiesWolf Star TechnologiesTim HunterUnderstanding and interpreting loads and linear dynamics results are challenges in most engineering problems. Wolf Star Technologies will show theoretical background, examples and demonstration of their integrated solutions for understanding loads and interpreting linear dynamic solutions. True-Load™ is the tool provided by Wolf Star Technologies that turns components into their own load transducers. True-LDE™ is the post processing solution for *MODAL DYNAMIC, *STEADY STATE DYNAMICS and *RANDOM RESPONSE solves which makes post processing interactive and natural while reducing solution time and storage requirements by up to 90%. All of the Wolf Star Technologies solutions are Abaqus/CAE plug-ins and have direct interface to fe-safe® which makes fatigue analysis a natural part of the design evaluation cycle.

Keywords: SIMULIA, Linear Dynamic Solutions, Load, Post-Processing, Fatigue Analysis

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