Stress-dilatancy behavior for sand under loading and unloading conditions

Zhenyu Yin (1) , Ching S. Chang

1 MEO - Matériaux Environnement Ouvrages

Experimental results have shown very different stressdilatancy behavior for sand under loading and unloading conditions. Experimental results have also shown significant effects of inherent anisotropy. In this article, a micromechanics-based method is presented, by which the stressdilatancy relation is obtained through the consideration of slips at the interparticle contacts in all orientations. The method also accounts for the effect of inherent anisotropy in sand. Experimental results on Toyoura sand and Hostun sand are used for illustration of the proposed method.

Mots clés: sand; micromechanics; plasticity; dilatancy; anisotropy; unloading

Domaines: Mécanique [physics.med-ph]; Matériaux

Zhenyu Yin, Ching S. Chang. Stress-dilatancy behavior for sand under loading and unloading conditions. International Journal for Numerical and Analytical Methods in Geomechanics, 2013, 37 (8), pp.855-870. ⟨10.1002/nag.1125⟩. ⟨hal-01007331⟩