Altair Multiscale Designer 2021 Release Notes

New Features

Fiber Orientation Tensor – Individual Slice or Average Slice Option
Now when simulating reinforced injection molded materials, users have the option to select damage law implementation at the Individual Slice level or at the Slice Average level. For each fiber orientation tensor, n-slices are generated for a given layer. The default ‘n’ is seven (7) slices per layer. When calculating criteria for damage laws, the Individual Slice option will enable damage law behavior on each individual slice. The Slice Average option will enable damage law behavior on the average of all slices in the layer. In general, it is suggested to use the Slice Average option, which was not available in prior releases.
New Damage Laws
Three new damage laws were implemented aimed at Reinforced Injection Molded materials:
  1. Isotropic Volumetric Damage – Bilinear; used to model materials that exhibit catastrophic brittle behavior.
  2. Isotropic Volumetric Damage – 3-Piece Smooth; used to model material that exhibit evolving brittle behavior.
  3. Isotropic Smooth Damage and Rate Independent Plasticity – Used to model materials that exhibit evolving brittle and evolving ductile behavior, which is rate independent.
OptiStruct Linear Solution Sequences Supported
OptiStruct models that contain full nonlinear Multiscale Designer material models can now be used within linear (ANALYSIS STATICS) and non-linear (ANALYSIS NLSTAT) OptiStruct solution sequences.


Abaqus User Material Naming
The names of Abaqus Multiscale Designer material models can be any generic material name appended with a post-script of “_mdsMAT”. In addition, if the material model requires fiber orientation tensors, the name of the fiber orientation tensor file should be [MaterialName]_mdsFiberOri.dat.

Resolved Issues

  • Resolved issues with OptiStruct Linear Analysis not passing the Thermal Load to the Multiscale Designer Material Model correctly.
  • Resolved issue with Woven Unit Cell results; now results for all Unit Cells are output for each phase in the phase local coordinate system. Prior, all results for all Unit Cell phases were output in the global coordinate system.