The shear strength components of a rough rock joint

A non-linear failure envelope of hyperbolic type in terms of effective stresses for rock discontinuities is described by a simple three parameter expression, which contains the basic angle of friction, the roughness angle and the median angle pressure. The components of friction, dilation and breakage of asperities are derived. The proposed expressions are related to the widely used failure law of a logarithmic type proposed by Barton and the...