Implementation of an anistropic hardening constitutive model for large deformation analysis

For the analysis of embankments on soft clays, a constitutive equation was proposed, which is based on an anisotropic hardening rule and the total stress concept. The constitutive model was implemented in ABAQUS code, such that large deformation analysis can be performed accurately and efficiently. The formulation includes (1) finite strain plasticity on the basis of the Jaumann stress rate, (2) implicit stress integration and (3) consistent tangent moduli. A large deformation analysis was performed with the proposed constitutive model using ABAQUS. In the analysis of an actual embankment, it was found that the proposed model is formulated accurately and efficiently. The proposed model could predict the undrained behavior of soils reasonably.