Stress strain curve generation from simple triaxial parameters

A simple hyperbolic function is often used to illustrate typical stress‐strain behaviour of geomaterials during monotonic loading. This approach has the disadvantage that the failure condition is approached asymptotically, whereas in reality failure must occur at a finite value of strain. A modified hyperbolic function with one adjustable parameter is proposed in this paper. The function is shown to be capable of spanning all likely soil stress‐strain data up to and including peak strength.