A yield criterion for isotropic and cross-anisotropic cohesive-frictional materials

This paper proposes a yield and failure criterion for cohesive and frictional materials. The function is givenby the combination of a Lode dependence for the behaviour in the deviatoric plane and a meridian functionfor the pressure-dependent behaviour. A variety of shapes can be achieved with the proposed criterionincluding Lode dependences which are able to reproduce the behaviour of isotropic and cross-anisotropicmaterials in the deviatoric plane. The criterion is validated through the comparison with experimental databased on multiaxial experimental tests on clays, sands, rocks and concrete. Finally, the convexity of thecriterion is analysed and discussed.