group_materi_plasti_mohrcoul_softening index phi_0 c_0 phiflow_0 phi_1 c_1 phiflow_1 kappa_crit

Both yield data and flow data (indicated by the word flow) for Mohr-Coulomb softening plasticity. See the theoretical part. Choose each of the angles phi_0 phiflow_0 phi_1 phiflow_1 in between $0$ and $\frac{\pi}{2}$. The index specifies the element_group, see element_group.