Paul-Mohr-Coulomb Failure Criterion for Geomaterials

Paul-Mohr-Coulomb (PMC) failure criterion provides enhanced representations of pyramidal failure surfaces, with recognizable material parameters, by considering all three principal stresses. PMC exhibits traits of more complex failure criteria through piecewise linear approximations to a curve failure surface, in changing both mean stress and Lode angle. A new least-squares fitting approach is developed to determine three PMC material...