The main factors such as pressure, the third invariant of stress tensor, strain hardening and softening, stain rate and tensile damage have been taken into account in the constitutive model.
该本构模型全面考虑了压力、应力第三不变量、变形的硬化和软化、应变率强化以及拉伸损伤等各个影响因素。
2
It is found that the relationship between cutting stress and displacement can be divided into two types of gradually hardening and softening alter peak value.
由试验资料发现，剪切面上的剪切应力与剪切位移关系可分为逐渐硬化和峰值后软化两种类型。
3
When the dry density is relatively high, this dense specimen shows shear dilatation characteristics, and the effective principal stress ratio tends to be strain softening phenomenon.