A note on the Mohr-Coulomb and Drucker-Prager strength criteria

摘要

This paper presents different expressions of the Mohr-Coulomb (M-C) criterion as well as the interrelationships between them, which lays a foundation for the definition of the equivalent M-C friction angle φmc. The characteristics of four types of Drucker-Prager cones matched with the M-C surface are compared as the friction angle φ varies from 0° to 90°. The minimum and maximum value of φ for them is given and the influence of the intermediate principal stress σ_2 to the major principal stress σ_1 is demonstrated using their φmc.