煤岩体在外载荷作用下发生失稳破坏时的一个重要性质就是其变形具有应变软化的特征。
An important characteristic of instability failure of coal and rock which is subjected to external loadings is that its deformation possesses property of strain softening.
采用逐步递增混凝土表面应变的非线性分析方法，分析了受扭构件从开始受荷到构件破坏全过程的内力与变形关系。
A nonlinear full range analysis of torque-twist relationship of torsional member taking into account the gradual increase in strain on the concrete surface is discussed in this paper.
从岩石的全应力-应变曲线出发，建立了描述围岩变形破坏的弹塑性本构方程。
Based on a complete stress-strain curve of the rock, an elastoplastic formula describing rock deformation failure is established.
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