In the "Material Model - Isotropic Nonlinear Elastic" window, you can select the yield laws according to von Mises, Tresca, Drucker-Prager and Mohr-Coulomb yield rules. Using these rules, you can describe the elasto-plastic material behavior. The yield function depends on the principal stresses or the invariants of a stress tensor. The criteria apply to 2D and 3D material models.