Dear all,

I am modelling foam compression in Abaqus using the crushable foam model and hardening option. the model requires two data values which are the compression yield stress ratio K

and the hydrostatic yield stress ratio (Kt) which is the ratio of the initial yield strength in hydrostatic compression Pc0, and the yield strength in hydrostatic tension Pt.

I ran one triaxial compression test and got the a stress called deviator stress and another one called the axial stress. I am not sure which one to use as the value for Pc0 .