A hypoplastic model for mechanical response of unsaturated soils

作者：Masin David^*; Khalili Nasser

来源：International Journal for Numerical and Analytical Methods in Geomechanics, 2008, 32(15): 1903-1926.

DOI：10.1002/nag.714

• unsaturated soils
• hypoplasticity
• effective stress
• non-linearity
• collapse

A new constitutive model is developed for the mechanical behaviour of unsaturated soils based on the theory of hypoplasticity and the effective stress principle. The governing constitutive relations are presented and their application is demonstrated using several experimental data front the literature. Attention is given to the stiffening effect of suction on the mechanical response of unsaturated soils and the phenomenon of wetting-induced collapse. All model parameters have direct physical interpretation, procedures for their quantification from test data are highlighted. Quantitative predictions of the model are presented for wetting, drying and constant Suction tests.

• 出版日期2008-10-25