Radioss Interface 2021 Release Notes

Radioss Interface

New Features

Support of Radioss solver version 2021
The new Radioss solver version 2021 is supported along with major keywords updates.
Elemental time step quality criteria
The shell elemental time step is now available as meshing quality criteria, which adapts the quality of the mesh with respect to the solver elemental time step value.

Figure 1.
New encryption
The new encryption using the keyword /ENCRYPT is now fully supported and encrypts Materials, Properties, Curves, and Failure keywords. The encryption process can now be started from the contact menu of the entities in their dedicated browser views. An additional column is added to inform you about the keywords that are encrypted.

Figure 2.

Resolved Issues

  • Issue 1: /BEGIN card is now editable in the Model Browser.
  • Issue 2: Some keywords were incorrectly grouped as “ungrouped” into the Model Browser.

Altair HyperCrash

New Features

New Radioss 2021 Solver Interface
The new Radioss solver version 2021 is supported.
New Keywords
The following Radioss keywords have been added:
  • /MAT/LAW108
  • /MAT/LAW101


Updated Keywords
The following keywords have been updated to in Radioss solver versions 2020 and 2020.1:
  • /MAT/LAW51
  • /MAT/LAW63
  • /MAT/LAW81
  • /MAT/LAW92
  • /MAT/LAW94
  • /MAT/LAW95
  • /MAT/LAW100
Enhancements were made to the import/export csv file with connected part IDs instead of property IDs.
Solver Conversion
The following LS-Dyna keywords are now fully supported in the conversion to the Radioss solver:
  • *MAT_119
  • *MAT_083

Resolved Issues

  • Issue in position calculation for LS-DYNA *DEFINE_TRANFORMATION using POINT and ROTATE ins sequence
  • Issue in Radioss result initializer process when 0 integration is defined in the shell property card
  • Issue in model checker when checking if any material stress-strain curves are crossing each other. The check is now enhanced to report all valid errors of material curves definitions.


  • Due to the removal of HyperMesh standalone, all the links to start HyperMesh from HyperCrash have become obsolete and have been removed.