Isotropic yield surface based on the second invariant of the deviatoric stress: yielding occurs when J₂ = ½ s_{ij} s_{ij} reaches a critical value k². Predicts yield in ductile metals essentially independently of hydrostatic pressure.
Isotropic yield surface based on the second invariant of the deviatoric stress: yielding occurs when J₂ = ½ s_{ij} s_{ij} reaches a critical value k². Predicts yield in ductile metals essentially independently of hydrostatic pressure.