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中文摘要：
通过先升温后加载、先加载后升温的实验研究,论证了加载和升温历史对材料损伤破坏的影响。采用连续损伤力学方法,研究了岩石材料在变温环境下的热损伤破坏问题,基于能量理论推导出材料在同时考虑温度、载荷和损伤耦合效应的计算材料损伤余能释放率的余能函数。根据损伤余能释放率,建立了岩石热损伤破坏准则。指出研究岩石在温度和机械载荷作用下的损伤破坏行为,应考虑热损伤-力耦合效应。
英文摘要：
From the experiments of changing the sequence of heating and loading, it draws a conclusion that the history of heating and loading have an effect on damage fracture of material. It analyzes the problem of rock＇s damage when temperature changes using the method of continuous damage mechanics and makes out the surplus energy function of damage surplus energy release rate of material damage on the basis of energy theory considering temperature ,loading and damage coupling effect. Rock＇s thermal fracture rules have been built up with damage surplus energy release rate and the problem of rock＇s thermal damage fracture deformation were studied under heating and loading. It point out that rock＇s damage fracture under heating and loading is a kind of thermo damage-mechanical coupling nonlinear effect.
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