An Elasto-plastic Constitutive Model for A Structural Sand with A Stress Dependent Dissipation Function

Abstract

An approach to the elasto-plastic constitutive modeling of structural sands is presented. The hardening parameter expressible of the degeneration of structure is macroscopically defined for normally consolidated and overconsolidated states of sands. The constitutive model is formulated from the stress dependent dissipation function within the framework of the thermomechanical principle. The sub-loading surface model is applied in order to describe the soil behavior of the overconsolidated state. The proposed model is verified with the triaxial tests of a sand