A generalized Mohr-Coulomb criterion implied by the revised Goodman-Cowin theory

In the present study, the constitutive relations derived in the revised Goodman-Cowin theory for granular matter are shown to imply a generalized Mohr-Coulomb criterion for impending flows. Due to the concept of microcontinuum and the incorporation of the internal friction into the expression of the Cauchy stress tensor, a constrained equilibrium stress state characterized by the Mohr-Coulomb criterion is yet obtained under uniform distributions of the grains.