A concept of correction functions to account for non‐associative characteristics of geologic media

A new and simple concept based on the idea of correcting for non‐associative characteristics of (geologic) media is presented. A special form of the concept is adopted and introduced in a critical state plasticity model. An example problem of behaviour of a soil tested under triaxial conditions is included. The concept can permit a simplified treatment of non‐associativeness and under certain assumptions can allow use of existing formulations of plasticity by maintaining symmetry of the associated matrices.