An Anisotropic Clay Plasticity Model for the Cyclic Resistance



In this paper, an advanced critical state compatible Bounding Surface (BS) plasticity model for the cyclic response of clays is developed based on a prior version of a Simple Anisotropic CLAY plasticity (SANICLAY) model. With the proposed model, named SANICLAY-BS and abbreviated as S-BS, it is possible to capture the presence of a cyclic stress threshold above which large strains develop leading to the effective stress failure. In addition, the number of cycles to failure can be controlled for a wide range of applied CSRs. Peculiarity of the formulation is the incorporation of a novel activation mechanism into the destructuration law. Model performances in capturing a cyclic resistance curve are shown against the experimental data of Cloverdale clay.