Auxiliary plastic potential approach in elastoplasticity for soils

Abstract

The scope of this paper is to give an alternative to the use of an explicit plastic potential in elastoplastic models for soils. This is possible through the definition of a stress-dilatancy relationship and a simple expression for an auxiliary surface inlieu of a given expression of the plastic potential surface. This approach results in a flexible definition of the model and to very simple expressions of the auxiliary plastic potential derivatives.