The strain criterion for ductile shear failure based on the maximum principalshearstrain is established.
据此，建立基于最大主剪应变的岩土材料延性剪切破坏应变准则；
2
An equation for the calculation of true shearstrain was derived from the integration of infinitesimal shearstrain in plane shearing process with constant principalshearstrain direction.
对切应变主轴不变的平面简单切变过程，通过无穷小应变的积分，导出了真实切应变计算公式。
3
The study results show that generalized shear stress has a strong nonlinear relation with generalized shearstrain, and intermediate principal stress has interval effect on soil strength.