| 考虑温度效应的岩石损伤内时本构关系 |
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| 引用本文： | 李长春,袁建新.考虑温度效应的岩石损伤内时本构关系[J].岩土力学,1991,12(3):1-10. |
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| 作者姓名： | 李长春 袁建新 |
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| 作者单位： | 华中理工大学力学系 武汉(李长春)，华中理工大学力学系 广东省水利水电科研所(付文生)，中科院武汉岩土力学所 武汉(袁建新，吴玉山，林卓英) |
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| 基金项目： | 本文为国家自然科学基金课题资助项目。 |
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| 摘 要： | 本文根据岩石类材料受载时的损伤破坏机理,首次引入两个损伤变量 D_1和 D_0用以反映外载荷体量和偏量的作用,在内时理论的基础上建立起考虑温度效应的岩石损伤本构方程,并导出具有明确物理意义的本构方程增量型关系式。在不同温度下用大理岩试样进行了压缩实验和声发射实验。根据实验所得结果,确定了本构方程中材料的所有参数,得到了大理岩材料受温度影响其性质发生变化的一些有意义的结论。
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| 关 键 词： | 岩石 损伤 本构理论 温度效应 |
Rock Material Damage Constitutive Equations Based on Endochronic Theory Concerning Temperature Effect |
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| Li Changchun,Fu Wensheng,Yuan Jianxin,Wu Yushan,Lin Zhuoying.Rock Material Damage Constitutive Equations Based on Endochronic Theory Concerning Temperature Effect[J].Rock and Soil Mechanics,1991,12(3):1-10. |
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| Authors: | Li Changchun Fu Wensheng Yuan Jianxin Wu Yushan Lin Zhuoying |
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| Abstract: | According to the damage mechanism of rock materials, a set of constitutive equations with temperature effect taken into account has been obtained by means of introducing two damage variables into endochronic theory. The constitutive equations can be used to describe the rock material deformation process at different temperatures and under different loadings. The damage variables represent respectively hydrostatic stress decrease in void rate and fracture due to deviatoric stresses. The parameters in the constitutive equations can be determined by uniaxial stress-strain curves. Experiments on marble samples have been performed in the temperature range of 20℃-500℃ at an interval of 50℃ and all material parameters in constitutive equations were determined by experimental results. |
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