Foam material is a porous material and should be better handled by the material models that account for porosity. In ANSYS Explicit Explicit Dynamics, the material models that can take porosity into account are * crushable foam * compaction EOS linear * compaction EOS nonlinear * P-alpha EOS. For the foam material if going to be used in drop test, impact or crush simulations, one may consider to use crushable foam material model. Please keep it into mind that the stress/strain relation used in this model is the relation between principal stress and volumetric strain. Please see the attached online help (.pdf file) on crushable foam model for more information. Also find attached a workbench sample file for reference using a rigid ball to impact a foam block.

1.2050834.zip