a highly-tuned modeling environment for crash analysis and safety evaluation

Copyright © 2011 Altair Engineering, Inc. All rights reserved. Altair Proprietary and Confidential Information V01

A Highly-tuned Modeling Environment

for Crash Analysis and Safety Evaluation

Giuseppe Resta

Altair Engineering

November 2011


HyperCrash: Presenter Introduction

Giuseppe Resta

• Business Development Manager for Crash and Safety

• M.S. Mechanical Engineering

History with Altair

• 12 Years with Altair

• Technical Support Engineer

• Crash Solver Specialist

• HyperWorks Program Manager for Crash

• HyperCrash Program Manager

Agenda*

• New Features demonstration (10 minutes)

• Q/A 5 minutes

*Presentation based on released HyperCrash 11.0 401 and soon to be released HyperCrash 11.0-402


Software Download Page: Updates added regularly

www.altairhyperworks.com

http://www.altairhyperworks.com/


HyperCrash: Support of Transformation for LSDYNA

• HyperCrash provides a way to apply a geometric transformation to an LS-DYNA include file or to a set of nodes

• HyperCrash fully support *Include_Transform *Define_Transformation and *Node_Transform

• HyperCrash allows easy creation, review and modification for such models. Also changes to any transformation are applied real time.


HyperCrash: Support of Transformation for LS-DYNA

• HyperCrash also covers complex scenarios defined by:

• Multiple instance of the same model

• Id offset and Scaling

Multiple Instances

Offset control and setup for Transformation


HyperCrash : Improved Coverage for Submodel

• Enhanced support for SUBMODEL with control for ID offset now available

• GRNOD and other RADIOSS groups are now supported for //SUBMODEL

Control for ID offset

Group of Submodel created from

selection in model browser


HyperCrash : Connectivity/Find Attached

• A new connectivity feature is available for LS-DYNA.

• HyperCrash identifies as attached parts, also the ones connected with special entities such as:

• *CONSTRAINED_EXTRA_NODE, *CONSTRAINED_RIGID_BODIES

• *CONTACT_TIED, *CONTACT_SPOTWELD

Connectivity types

taken into account

Connectivity and mask toolbar


HyperCrash : Dummy Positioning

• Undo capabilities to restore initial conditions for individual limb or for the entire dummy.

• A new Positioning File that can be exported and later retrieved to automatically reposition the dummy using a batch process.

• Database Access Configurable Database Access

Undo and Batch

Process Control


HyperCrash: Part Replacement

• Accurate replacement covering of all keywords

• Detailed status report for each entity

• Fully replaced

• Partially replaced

• Not replaced

The System “CID” is not replaced and the entity linked to it

are shown in red [not replaced] or orange [partially replaced] Example of Part Replacement


HyperCrash: Part Replacement

• Two options in replacement

• Single part “Mesh Only” to replace just nodes and elements

• Entire Subsystem substitutes new parts and their attributes

• Two mechanisms adopted in replacement

• Proximity search of closest node

• Replace all nodes in a part

• The Replace Report also can be used to Show, Hide or Edit objects

Replace process with

Report and optional editing


• Solid Spotwelding modeled using single HEXA or a cluster of 4, 6, 8, 12 and 16 combined solids, for RADIOSS

[starting with 10.0-SA-205] and LS-DYNA

• Continuous glue modeling is now possible with different number of elements in width and height

• User control is available to parameterize element size, failure criteria and contact used for both 1D and 3D

welds

• Spotweld can be optionally created using a single material and property, instead of individual ones for each

logical connection

HyperCrash: Connections

Spotwelding with 1,4, 8, 12 or 16 cluster of solid elements

Glue with contiguous hexa modeling


• HyperCrash offers now an accurate mass calculation for LS-DYNA

• Mass information reported following LS-DYNA d3hsp file format structure:

• Total Mass

• Part Mass

• Structural Mass

• Non structural Mass

• Lumped Mass

HyperCrash: LS-DYNA Mass Calculation

Mass Part Details


• Mass Balancing can be performed by modifying the location of

the Center of Gravity [COG]

• The Total Mass can be calculated ignoring the contribution of

lumped masses

• The user can set some of the parts as ‘not active’ during the

mass adjustment. Lumped masses will not be added on them,

but the total mass of the part selection will still be matched

HyperCrash: New LS-DYNA Mass Balancing

Mass Balancing with COG control Lumped Mass Distributed


• The user may define Target Mass for Parts and Assemblies by direct input or by external file reading

• A new function distributes lumped masses to Match Target Mass value specified keeping the Parts COG

unchanged

• HyperCrash has the ability to create mass of general types or special ones used to represent a missing system

in the model or masses created during the balancing process

HyperCrash: Target Mass Matching

Target Mass: Definition and Matching Capabilities HyperCrash offers proprietary modeling

formats for LS-DYNA Masses


• Quality/Contour check uses colors to differentiate between parts based on different display attributes:

• Young module

• Density

• Yield Stress

• Max Stress

• Material Law

• Thickness

HyperCrash: Contour Quality Check

Suspicious asymmetries detected

Parts grouped in browser

by common value Young module representation


• Great effort is placed to maximize stability in the application.

• Additional protection is added by automatically saving the model, if the software fails unexpectedly

• The saved session can be restored at the next start-up

HyperCrash: Software Failure Detection

Previous session can be recovered

Emergency save


• Model accuracy is enhanced by real time checks of the mandatory fields essential to run an analysis

• Improvement in the GUI of the export selection

• RELATIVE or ABSOLUTE PATH for Include

• Add option to merge an imported file as Include

• New Standard GUI layout offered at startup

HyperCrash: Other Enhancements

Example of mandatory fields for

Element_Seatbelt_Acceleromenter

Absolute Relative Path for Include 3 GUI Themes available


• Results Mapper is now available for LS-DYNA profile

• Proper coverage of an LS-DYNA penetration check

• Improvement of the BOX panel is now offered

• Enhancement for *INCLUDE with support of:

• *INCLUDE_PATH

• *INCLUDE_STAMPED_PART

• *INCLUDE_NASTRAN

• Support of long directory path for LS-DYNA Include

HyperCrash: Other Enhancements for LS-DYNA

Result Mapper

X-Y-Z value of nodes rearranged to be

compatible with LS-DYNA requirement


• Many RADIOSS panels are now enhanced:

• Dynamic review is now available in a list using the up and down arrows on the keyboard

• Multiple items can be selected holding the left mouse and scrolling the mouse

• A new review capability is available using the right-click option

• Improvement in Selection:

• Validation by right-clicking the mouse is now offered to complete processes such as: selection of items within the graphics area,

with great reduction in mouse travel

• This is in addition to pressing the ‘OK’ button or the ‘Y’ key on the keyboard

• Enhancement in renumbering. Part and subset are no longer grouped together in the renumbering panel

HyperCrash: Other Enhancements for RADIOSS

Part and Subset are shown

separately in renumbering

Some of the enhancements

in the new Panels


• *Parameter supported for thousands of attributes in hundreds of LS-DYNA cards:

• from simple thickness and element formulation, to nodes ID or its X Y Z coordinates

• from *Include_Transformation, to points in a *Define_Curve

LS-DYNA: Support of *Parameter

Section Shell: parameters for thickness and elem formulation.

Both the parameter name and its actual value are shown

*NODE: its ID or x y z

coordinates can be

parameterized

Similarly initial velocity

direction and magnitude


LS-DYNA: GUI examples for *Parameter

Disassociation of a parameter or the

selection of existing one from right click

Creation of Parameter: INT or FLOAT

• Powerful and intuitive panels to create and modify parameters.


• Reference geometry cards are listed in the browser and also have a graphic representation.

• The seat deformer tool may now also generates reference state.

HyperCrash: Support for initial reference conditions

Initial geometry shown in the browser Click the check box to create

reference state automatically


• A bill of material “csv” file read to link mat, prop, thickness to PARTs or to create the part<>assembly structure

or to distribute mass to match a target value.

• A pop-up shows additional settings likr tasks to perform and location of mat/prop databases.

HyperCrash: New BOM assembly tool

Format of the comma separated BOM file.

Pop-up used to setup for model

Assembly

Read or export the BOM

from the model browser


• Local units can be defined for objects such as cload, cnode, grav, impacc, inivel, inter and pload.

• Mass, length and time units can be individually set using numerical scale factor or alphabetical syntax.

• Units are also supported for //SUBMODEL

RADIOSS: Support of local units

The “time” global unit is scaled 100 times

for the object using this local unit

When a local unit exists, an additional cell

will appear in the object page to select it


RADIOSS: Support of control cards

Flexibility to list active/all control cards

and group them by type

• Create, edit, import and export is now available

• Engine and Starter control cards are exported into a single file

Detailed description for each attribute.


RADIOSS: Miscellaneous

• New RADIOSS 11.0 user profile

• New RADIOSS Tools pull down

• Improved LS-DYNA to RADIOSS conversion

• Many improved panels like material, property, contact, gravity..

• Part and subset can now be renumbered separately

• Solver names are shown together with an attribute description

• Model checker now detects invalid options

New RADIOSS property panel

New pull down

Solver names are shown for added clarity


LS-DYNA: Miscellaneous

• Part selection is now improved allowing selection of only compatible types

• Enhancements in the setup of rigidwall and database cross section

• Direct selection of existing *SET in panels

• New graphic representation for Beam defined by coincident nodes

• Additional HyperCrash attributes shown for PART

• Different Icons shown based on PART type

Composite, rigid and initialized part icons Other HyperCrash attributes for part


HyperCrash: Miscellaneous

• Part title and proximity used for guidance in subsystem replacement

• New edit option for all entities available in model browser

• SPH elements have now a pull down and a faster rendering

• Many panels now show additional ID and title cells

• More powerful show info in toolbar

• Control over ID assignment

New edit option in browser

Different criteria offered for ID assignment

New element info pop-up

a highly-tuned modeling environment for crash analysis and safety evaluation

Technology

confidential information v01

id assignment

total mass

edit option

released hypercrash 11

graphic representation

rights reserved

altair proprietary