ANSYS Mechanical

Highlights

2019 R2 update presentation

Update areas

• Mechanical Interface

• Mechanical Core

• External Model

• Topology Optimization

• SMART Fracture

• Rigid Body Dynamics

• Linear Dynamics

• Substructuring

• Explicit Dynamics

• Post Processing

• General Axisymmetric

• Composites

• Contact

• MAPDL Solver

• Elements

• Multilinear Elastic Materials

• Material Designer

• Acoustics & NVH

• AQWA

• Additive Manufacturing

New Ribbon Interface• To improve usability, Mechanical now organizes its tools and commands using a contextual ribbon. Similar

commands are organized together in Tabs, making the interface faster to use, more intuitive, and helpful.

• Additions like the Quick Launch option, expanded Tool Tips and customizable Graphics Toolbar improve discoverability as well as usability.

Engineering Data in Mechanical

• A new Assignment panel in Mechanical lets you assign a material directly from Engineering Data without being in the Engineering Data Workspace.

• You can quickly choose a favorite, recent, or project material, or you can search for a material in the available libraries. Search for materials by Label, Library, material Model and/or material Properties.

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GRANTA Materials Data for Simulation

• The GRANTA Materials Data for Simulation product is now available (in the Mechanical interface only).

• Using the new search capability exposed for Engineering Data in Mechanical, you can quickly search for specific materials in this library

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Commands Object

• The commands object has been updated and now,‐ Provides an auto-completion drop-down menu (based on character entry) as well as a tooltip banner that displays

the associated command arguments (Mechanical APDL Solver only).

‐ Provides a search feature using the Ctrl+F key combination.

‐ Includes line numbers.

‐ Displays hidden characters such as paragraph marks and spaces.

‐ Provides colored syntax highlights for entries such as fixed values, variables, comments, etc. (Mechanical APDL or Rigid Body Dynamics solvers only).

‐ Provides integrated zoom in and zoom out options. Previously, zooming was performed using the mouse wheel.

‐ Has a preference category in the Options dialog that lets you specify the default behavior of some of the above features.

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NASTRAN File Export

• Users can now export your simulation as a NASTRAN bulk data (.nas or .bdf)

• Supported for:‐ Static Structural

‐ Modal

• Supported through Export Nastran File option in both context menu and context tab for the environment.

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Ribbon Tab Context Menu

Mixed-Dimension Analysis

• Mechanical now allows combining two-dimensional (2D) and three-dimensional (3D) bodies in the same model.

• For shell bodies (only) defined in the X-Y plane, the Dimension property on the Body object lets you set the body as either 3D (default) or 2D. Mechanical then uses this property to write the appropriate element type (3D or 2D) to the input file.

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Analysis type (Geometry type) set to 3D in

WorkbenchGeometry Dimension set to 2D in Mechanical on

Sheet Body

SMART Crack growth features

• Support multiple Crack Growth using SMART methodology• Evaluation of SIFS and J-integral results for all cracks in the model

• Newly supported options‐ Multiple Load Steps

‐ Thermal load

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RBD - New Joints

Constant Velocity (homokinetic/Cv)

Screw

New joint types have been added for the Rigid Body Dynamics system:

• Screw

• Constant velocity

• Distance

Distance

Abaqus composite SHELL SECTION support

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Nastran TEMP/TEMPD & BSURF/BSURFS support

• TEMP/ TEMPD imported as a temperature Body Load for Structural analyses.

• TEMP imported as temperature Constraint for Thermal analyses.

• BSURF imported as element component. BSURFS imported as element face component.

Topology Optimization - SIMP

• SIMP based Topology Optimization of Thermal Stress analysis

• SIMP based Topology Optimization of Reaction forced based on the maximum value computed from the summation of reaction force

• Parameterization of constraints and optimization input parameters

• Include Exclusions effect for AM Overhang angle constraint ( Beta)

• Lattice optimization is supported with Linux

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Topology Optimization - Level-Set

• Density-based method suffer from lack of properly defined boundary‐ Forces the designer to interpretation of a poorly defined geometry

• Level-set-based method “pushes” the boundaries‐ Result is a water-tight smooth surface, ready for re-analysis, printing or re-CADing

Density-based optimization for various commercial products

Level Set-based optimization in ANSYS Mechanical and Discovery Live

Tets & HexManufacturing constraints• Pull out• Max Thickness

Bearing Modeling – FLUID218

• In ANSYS 2019R2, the clearance can be different for each FLUID218 node to support the analysis of:

‐ Elliptic bearing

‐ Multilobe bearing

‐ Split-halves bearing

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Goal: Extend the applicability of FLUID218 to simulate non-cylindrical bearings

Pressure Plot showing the gaps due to different bearing shapes represented by FLUID218

Model Frequency Display

12 modes in evaluation

12 modes in chart and tabular data

• Frequency Display is available under Post Processing Category of Solution object.

• Modal Analyses Only.

• Displays when the Solver Type property (Analysis Settings) is set to Full Damped.

Output controls and Result file compression

• Additional output controls added which provides granular controls on the outputs written to the result file. The defaults for these controls have been chosen carefully based on analysis and physics type.❖ Surface Stress❖ Back Stress❖ Contact Data❖ Nonlinear data❖ Result File Compression❖ Element Current Density❖ Electromagnetic Nodal Force❖ Heat Generation Rate❖ Result File Compression

• The Result File Compression controls the compression level for the result file with the following options

• Program Controlled• Sparse• Off

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Bolt Pretension Solve Behavior option

• Solve Behavior option of “Combined” (default) and “Individual” is exposed. With “Individual” option selected, the user can create one Bolt Pretension object for multiple Body selection instead of those many objects

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With “Individual” option, only one object is required

NLAD features

• Supports Normal Lagrange and MPC contact for Non linear Adaptive Region

• Nonlinear Adaptive Aggressive Remeshing is supported

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Substructuring - Usability Workflow Improvement

• Deletion of multiple rows from the Condensed Part Worksheet

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Mechanical Explicit Dynamics – 2019 R2

• Explicit Dynamics has taken advantage of the new Ribbon Toolbar

• Stepawareness is available now for Output Controls

• Tabular acceleration input

Acoustic Intensity

RealImaginary

NVH - We have exposed Multiple RPM results in Acoustic Harmonics. Note : Multiple RPMs behave like multiple load steps.

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Deformation Scale Factor on Legend & Viewport sync

• A new annotation display option (off by default) of Deformation Scale Factor on Legend for results

• Available using the right-click (context) menu for the result legend displayed in the Geometry window.

Display the currentscaling value on Legend

Composites

• ANSYS Composite PrepPost (ACP)

‐ Save ACP Model Status

‐ Excel Interface

‐ Support for Coordinate Systems Names from Mechanical

‐ Improved Interpolation Algorithm

Support for Coordinate System Names from Mechanical

• The names of the coordinate systems are now maintained when they are transferred from Mechanical to ACP (e.g. B4 to B5 as shown on the right).

• Models created with previous versions are updated if possible.

• Please refer to the Known Issues & Limitations in the ACP User’s Guide for more information about upgrading from previous archives.

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B4 - B5

ACCS Enhancements

• The UI of ACCS adapts the new ribbon design (A).

• Silent install and uninstall is now supported.

• The default values for material properties evolution have been changed (B).

• Corrected minor bug in computation of material properties evolution.

• Corrected minor bug in unit support for material properties evolution.

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(A)

(B)

Note: Because of the enhancements, the results can differ if compared with previous versions.

Enhancements on Initial Contact Adjustments

• In 2019R2, a new CNCH,TADJ option physically moves the target body towards the contact surface in the constraint direction with the shortest distance calculated.

• 2019R2 , CNCH,ADJU/MORPH/TADJ can be input by the table which specifies different adjustment parameters for multiple contact pairs, thereby eliminating the need for multiple CNCH commands. Exposing to Workbench will be straightforward.

*dim,cntab,array,3,3cntab(1,1)=11,15,17cntab(1,2)=-.002,-.002,-.002cntab(1,2)=-.001,-.001,-.001cnch,tadjust,%cntab%

Tabular input for TADJ

RID=11 RID=15 RID=17

Exponential Pressure - Penetration Relationship (2019R2)

• 2019R2 offers a new contact pressure vs penetration relations in an exponential form for the penalty method. ➢ KEYO(6)=3 and KEYO(2)=0,1. P0 via real 7, C0 via real 8

• It is an individual contact detection based contact stiffness

• The resulting contact stiffness is no longer constant with a pair.

• The default behavior serves the most contact models. In general it is used to make contact behavior smoother:➢ Self contact➢ Hyper elastic materials like rubber➢ Models having large initial gap, ➢ Mesh size varies across the contact surface ➢ Interface chartering.

• In addition, pressure – penetration relationship can be defined via tabular format or a user subroutine.

• Many NLAD models can be solved much easier by simply setting KEYO(6)=3 with all other default parameters

Structural-thermal plastic extrusion using NLAD and exponential law for rigid-flex contact pair

Without exponential law for contact, analysis stops at 10% deformation

Full extrusion achieved when exponential law used

MAPDL - Performance Improvements

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0

5

10

15

20

25

2 4 8 16 32 64 128 256

Spee

du

p

Number of Cores

DMP Scaling Comparison

2019 R1

2019 R2

Substructuring – New!

0

2

4

6

8

10

4 8 16 32 64 128 256

Spee

du

p

Number of Cores

DMP Scaling Performance

2019 R1

2019 R2

SMART

0

2

4

6

8

10

12

2 4 8 16 32 64

Spee

du

p

Number of Cores

DMP Scaling Performance

R19.1R19.22019 R12019 R2

Normal Lagrange sliding contact

• New compression algorithm (sparsify) on by default– Smaller results files (10-50% on average)

– Lossless compression of results file data

– Virtually no performance penalty

– Codes that directly read the MAPDL results file without using binlib.dll will no longer work!

Multilinear Elasticity

Current generation elements now support multilinear elastic materials (MELAS) and is defined by TB,MELAS command. This material is elastic and unloading is fully reversible

Elements support: PLANE182 (plane strain or

axisymmetric), PLANE183 (plane strain or

axisymmetric), SOLID185, SOLID186, SOLID187,

SOLSH190, SOLID272, SOLID273, SOLID285,

PIPE288, PIPE289.Material

Simulation

0

0,2

0,4

0,6

0,8

1

1,2

1,4

1,6

0 0,001 0,002 0,003 0,004 0,005

Stre

ss

Strain

3

5

12

4

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Material Designer - Particle Reinforced Composites

• Material Designer now supports particle reinforced composites as additional predefined RVE types.

• Can be used to model materials such as ‐ syntactic foams

‐ metal matrix composites

• For user defined RVEs, it is now possible to specify element orientations that vary over a body using edge and/or surface guides.

Acoustics - Surface Force Density Using Nodal Forces

• To improve performance a new option added in MSUP to switch from Pressure to Nodal Force application ‐ No load vectors

‐ Load applied using F command via tables in the use pass

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Waterfall Diagrams Results UI Controls

• UI controls have been added for waterfall diagram results to allow probing and user defined lower/upper bands

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Export Result to VRXPERIENCE Sound

• New option allows to send result to VRXPERIENCE Sound Dimension LEA software for sound synthesis, sound design, psyochoacoustics…

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AQWA - Offshore ACT Extension (Beta)

• Exposes in Workbench the MAPDL Ocean functionality, allowing the calculation of submerged beam loads due to various sea states.

• Applied in Mechanical’s systems:

Static

Transient

Modal

Harmonic Response

Additive Prep in SpaceClaim

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Heartcellsupport

Rod supportBlock with angled support

• Included in Additive Print and Additive Science

• Available as an add-on to SpaceClaim

Additive Prep Support Options

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Block with angled support

Block support

Supports from .stl Files

• You can now insert supports directly from .stl files at any time prior to simulation, separate from the part geometry. This feature is designed specifically for volume-less type of supports such as those from Additive Prep.

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Volume-less support (in blue) from an .stl file. The support's voxel hex mesh and the part's layered tetrahedron mesh both respect the additive layers, as shown on the right.

Additive Print – Removed Decimation

• Previously we reduced the triangle facet count to 40,000 triangles. This posed problems for certain geometries. Now, all operations (except part preview in the UI) use the original STL file at its provided accuracy.

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Decimated to 40k Triangles (<=R1)

Un-decimated(R2)

Additive Print & Science – Assignable Data Storage Location

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• Users can now assign their Additive data to the directory of their choice

{"authPort":9002,"minioPort":9001,"simulationAPIPort

":5000,"workflowAPIPort":8181,"workingDirectory":"C:

\\Users\\xxxxxxx\\AppData\\Local\\Temp","userDataDir

ectory":"C:\\Users\\xxxxxxx\\AppData\\Roaming\\ansys

-additive"}

Users assign temp working directory

{"authPort":9002,"minioPort":9001,"simulationAPIPort

":5000,"workflowAPIPort":8181,"workingDirectory":"C:

\\Users\\xxxxxxx\\AppData\\Local\\Temp","userDataDir

ectory":"C:\\Users\\xxxxxxx\\AppData\\Roaming\\ansys

-additive"}

Users assign data directory

Additive Science - Microstructure Solver

• Predicting microstructural details− User Inputs Include:• Scan Pattern

• Laser Power/Speed

• Feature Size

− Thermal solver provides:

• Thermal gradients

• Solidification rates

• Meltpool sizes & shapes

• Meltpool velocities

− Microstructure solver predicts:

• Grain size & orientation▪ VTK Visualizations as well as statistical data

BETA

Workbench Additive - Enhancements

The Additive Wizard has been enhanced

● Supports layered tet mesh option● Supports symmetry● Supports inclusion of powder elements● Supports adding of heat treatment step

Import external supports, e.g. from Magics or new Additive Prep

● Volumeless STL● Uses Additive Print add-in to compute knockdown factors

○ Applied to [K], DENS, and [D]

MAPDL – Inherent Strain

Thermal-Structural Inherent Strain