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
