Figure 1. Crushable foam model with isotropic hardening: yield surface and flow potential in the p–q stress plane [32]

From

Fracture Toughness of Titanium Foam Using Finite Element Crushable Foam Model

Talal S. Mandourah

American Journal of Mechanical Engineering. 2018, 6(3), 127-131 doi:10.12691/ajme-6-3-5