Microdirectional models involving a mesoscopic scale constitute a good alternative to phenomenological models. In the H-microdirectional model, the granular assembly is modeled by a distribution of hexagonal patterns of grains in contact oriented in space. In this paper, we investigate the micromechanical origin of the liquefaction observed from the H-microdirectional model in the light of an analysis of individual behavior of each hexagon. It is shown that the principal direction of anisotropy determines the liquefaction susceptibility of a soil, whereas the degree of anisotropy affects the amplitude of the post-peak loss of shear strength.
Shear Strength Principal Direction Softening Phase Biaxial Test Granular Assembly
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