Modelling the behaviour of sensitive clays experiencing large deformations using non-local regularisation techniques

This paper presents a methodology to simulate the strain-softening-hardening response of sensitive clays when subjected extensive remoulding. A non-local strain-softening technique is implemented into Abaqus Finite Element Analysis (FEA) software through its user defined material subroutine UMAT, in form critical state based constitutive model. For comparison conventional and formulations, series analyses have been performed investigating mesh dependency issues validity simple softening-scaling rule for practical applications. The model significantly reduces solution mesh-dependency small-strain biaxial shear updated Lagrangian buried pipe uplift. Finally, applied undrained cycles penetration consolidated-undrained capacity T-bar kaolin clay. analysis highlights limitations use standard element tests (e.g. triaxial tests) calibrate input parameters that control aspect law, need law captures partial recovery sensitivity during consolidation.