ABSTRACT
A constitutive model for coupled elastoplastic anisotropic damage is proposed for clay-stones. A second rank tensor is used to characterize anisotropic damage state. The damage effect on plastic flow is described through the concept of ‘net’ stress tensor. Damage growth is determined through a damage criterion formulated as function of tensile elastic strains. The parameters are determined from triaxial compression tests with unloading-reloading cycles. Comparisons between numerical simulations and experimental data are provided. Influences of moisture content on overall mechanical strength as well as damage process are also studied.
