推导出损伤应变能释放率张量。
文中还讨论了受损材料的本构方程和两种损伤应变能释放率。
The constitutive equation for damaged material and two damage strain energy release rates are also discussed.
采用虚拟裂纹闭合技术计算裂纹扩展的应变能释放率，并对裂纹扩展寿命进行计算。
The strain energy release rate of the crack propagation was calculated by using virtual crack closure technique, and fatigue life was forecasted.
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