Modelling polymer foam indentation, using MAT_154 (Deshpande - Fleck) in LS Dyna

Hi,

Has anyone used MAT_154 in LS-Dyna, to model an indentation test on a polymer foam material? Im having a problem understanding the failure criteria implemented in the model. Apparently its based on volumetric strain, but when I model a simple 1*1*1 element, it doesnt fail at the given volumetric strain value, but fails at a higher value.

Id appreciate it if anyone with experience working on this model could advice. Thanks a lot

Saz

I have not tried that model...

Have you asked LS-DYNA support?

-Jorgen