A kind of explanation of reversible dilatancy of soils

The reversible dilatancy of soils was studied from the viewpoint of anisotropy of soils.Based on the theoretic analysis of the anisotropic elastic constitutive relation,the reversible dilatancy was partly explained by the elastic dilatancy deformation caused by soils anisotropy.Grounded on the relevant experimental results of soils elastic parameters,the influence of stress-induced anisotropy on elastic dilatancy of soils was studied.It was found that the elastic dilatancy of soils increases with the rise degree of stress-induced anisotropy.In the light of elastic dilatancy of soil,the condition of volume-contraction in unloading of shear tests was studied.It was obtained that volume-contraction in unloading of shear tests is controlled by the ratio of generalized deviatoric stress increment and the mean stress increment of loading stress path,the region of volume-contraction in unloading of shear tests was provided also.