Elasto-Plastic Constitutive Model for Unsaturated Soils with Subloading Surface Concept

Abstract

AbstractAn elasto-plastic constitutive model for unsaturated soils is improved to realize numerical stability of computations at the singular point on the yield surface and an accurate prediction of the mechanical behavior of overconsolidated (or elastic state) soils in this chapter. The authors introduce the exponential contractancy model (EC model) by Ohno et al. (J Appl Mech JSCE 9:407–414, 2006) and the subloading surface model by Hashiguchi and Chen (Int J Numer Anal Method Geomech 22:197–227, 1998) to the elasto-plastic constitutive model for unsaturated soils by Ohno et al. (J JSCE 63(4):1132–1141, 2007). The applicability of the constitutive model is verified by simulating triaxial shear tests under constant net stress undrained conditions.KeywordsSingular PointConstitutive ModelYield SurfaceTriaxial Shear TestUnsaturated SoilThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.