提出考虑土的应变软化、剪胀（剪缩）性和应力路径影响的非线性弹性模型。
Suggest the nonlinear elastic Constilutive model taking into the account of strain-softening, shear dilatancy(shrinkage)properties and stress path.
三轴压缩试验条件下，剪应力引起的体积变形一般是先剪缩后剪胀的，其大小由密度和应力状态决定。
The volumetric strain induced by shear stress is shrinking at first, then dilating later under triaxial compression test conditions, of which the value is determined by density and stress state.
粗粒土具有明显的剪胀剪缩性，为非虎克材料。
Coarse-grained soils exhibit evident dilatancy, and they do not obey the Hook's law.
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