ABSTRACT
In this paper, Hardening Soil model with small-strain stiffness (HSsmall) and DeltaSand model are used as constitutive soil models to simulate the Cone Penetration Test (CPT) using the Material Point Method (MPM). Both models are formulated within the double hardening framework, in which independent yield surfaces represent mechanical behavior of soil under deviatoric and volumetric loadings. DeltaSand is a new advanced state-dependent constitutive model in which the relative density is incorporated in the formulation to represent the mechanical behavior of soil under deviatoric and volumetric loading in different stresses and relative densities. The numerical simulations are compared with CPTs in Cuxhaven Sand in a calibration chamber. Both constitutive soil models are compared with each other and DeltaSand is found to be capable to capture the soil behavior during quasi-static CPT.
