FE-Modeling of Shear Resistance Degradation in a Sand Body During Cyclic Shearing Under CNS Condition
نویسنده
چکیده
The behaviour of dry and cohesionless sand body in a cyclic interface shear box test under a constant normal stiffness (CNS) condition is numerically studied. Do this end finite element calculations are carried out using a micro-polar hypoplastic model, where the mean grain diameter of the sand material is used as a characteristic length of the micro-structure. The constitutive equations for the stresses and the couple stresses take also into account the effect of the evolution of the void ratio, pressure dependent relative density, direction of rate of deformation and rate of curvature. A particular attention is laid to the volumetric strain change and the degradation of the shear resistance in the course of shearing.
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