Cam-Clay plasticity, part IV: Implicit integration of anisotropic bounding surface model with nonlinear hyperelasticity and ellipsoidal loading function

摘要

This paper describes a fully implicit stress-point integration algorithm for a class of anisotropic bounding surface plasticity models with ellipsoidal loading function. The plasticity model is coupled with a nonlinear hyperelastic model to ensure that the elastic component of the combined model is energy-conserving. A key feature of the integration algorithm for the combined model is a return mapping in strain space, which allows fully implicit integration and consistent linearization of the constitutive equations.