LS-DYNA Interface 2021.2 Release Notes

LS-DYNA Interface

New Features

Support of LS-Dyna solver version R11.2: The LS-DYNA solver profile R11.2 is now available with the relevant keyword updates related to this solver version.
New State Equation entity: The State Equations entity collects the LS-DYNA EOS keywords, which were previously defined into the Property entity.
New Model Clean-Up tool: The new Clean tool on the Validate ribbon is an efficient way to delete automatically all Empty or Unused or Undefined entities from the model, which may be created during model modification operations.
Model units conversion: The new Unit conversion tool on the Model ribbon provides an efficient way to convert a model from its original unit system to a new unit system. The covered unit systems are: (N,m,s,kg); (N,mm,s,T); (kN,mm,ms,kg); (N,mm,ms,g)

Enhancements

New Keywords

*CONTROL_MPP_DECOMPOSITION_REDECOMPOSITION, *DATABASE_RCFORC_MOMENT, *DEFINE_CURVE_DUPLICATE, *DEFINE_ELEMENT_EROSION, *ELEMENT_SOLID_H8TOH27, *ELEMENT_SOLID_H8TOH64, *INCLUDE_PATH_RELATIVE, *INITIAL_HISTORY_NODE_(OPTION)

Updated Keywords

*AIRBAG_PARTICLE, *DATABASE_EXTENT_BINARY, *DEFINE_TRANSFORMATION, *MAT_GLASS, *MAT_PIECEWISE_LINEAR_PLASTICITY, *MAT_SPOTWELD, *MAT_SPOTWELD_DA, *MAT_USER_DEFINED_MATERIAL_MODELS (MatFEM material law48), *SENSOR_DEFINE_FORCE

Comment anchoring to referenced entities

The Comment entity is enhanced to support referenced entities selection. This provides a convenient way to defined comment lines to a dedicated entity or group of entities. When an entity is referenced to a Comment entity, the *COMMENT is automatically written just before the referenced entity or group of entities.

Also, the Empty and Unused entity checks have been enhanced to consider the Comment entity.

Intersections and Penetrations Check tool

The algorithm is improved with following enhancements:

No intersections are reported anymore when solid component faces are exactly on the same level, or, when component shell edges lie exactly on a solid component solid face.
Previously, for nodes which are common to multiple components (example: T-connections, ribs on plastic parts…) the algorithm was considering the maximum thickness of the connected components for the calculation of the penetrations of those common nodes. This was leading to non-valid penetrations.
A new option “Re-check component shared nodes“ is added when checking penetrations on a selection of components. This option re-checks the penetrated component pairs having nodes shared by other components in order to filter out the wrong nodal penetrations.

Export of LS-DYNA I10 Format

A new export option is added to choose the type of i10 solver deck to write out. The exported deck can be written with the option i10=Y in *KEYWORD, or, with % sign at the end of each solver keywords.

Resolved Issues

ID offsets defined in multiple nested *INCLUDE_TRANSFORMs were not applied properly for some entities.
Modification in *CONTACT_TIED_NODES_TO_SURFACE Entity Editor to avoid OFFSET and CONSTRAINED_OFFSET options to be activated together, which was leading to a wrong keyword definition.
*DEFINE_ELEMENT_DEATH keywords will not be found as unused when checking for unused properties.
Correction to find correctly unused *MAT_ADD keywords when checking for unused properties.
Unused and Empty function is added for Sensor entity.
Empty function is added on Blocks entity to identify empty *DEFINED_BOX keywords.
Corrections in the detection of Empty contacts.
Empty function is added on Loads entity.
Dummy or Mechanism Positions are now not listed when checking for unused entities.
Display state for Pretensioner entity is added.
SET_SEGMENT and CONSTRAINT_JOINT are written with keywords attributes comments “N1, N2, N3, N4” only on the first line.
Nodes IDs with offsets applied by INCLUDE_TRANSFORM are now correctly identified in COORDINATE_SYSTEMS definition.
CONSTRAINED_NODAL_RIGID_BODY, CONSTRAINED_NODE_SET, CONSTRAINED_GENERALIZED_WELD and CONSTRAINED_SHELL_TO_SOLID defined with SET_NODE_GENERAL_COLLECT are now correctly read.
3^rd node of ELEMENT_BEAM is not more considered when checking untied nodes in TIED contacts.
In Orthotropic Materials, the material angle attribute is renamed to BETA as in solver manual.
Transformation of type POINT are now selectable in entity editor of POS6P transformation.
Changed entity editor definition of *MAT_ADD_EROSION to allow the parametrization of attribute DMGTYP.
An input deck having more than one *AIRBAG_SHELL_REFERENCE_GEOMETRY is now correctly imported. The behavior was broken in version 2021.1.