An elastoplastic model for soils exhibiting particle breakage

Abstract

An elastoplastic constitutive model exhibiting particle crushing is developed based on the framework of continuum mechanics. The proposed model is formulated based on the extension of the critical state soil model [1, 2] to firstly incorporate the effect of packing density on the stress-strain characteristics by employing the concept of subloading surface [3]. Then, the effect of particle crushing is further implemented by incorporating the evolution of particle size distribution curve due to crushing stress and its effect on the constitutive behavior. Finally, the performance of the proposed model is validated with experimental test. The simulation results show that in spite of a simple formulation of the constitutive model, the behavior of crushable soils is well predicted.