THEORETICAL ANALYSIS OF RELATIONSHIP BETWEEN STRESS AND STRAIN IN CONSIDERATION OF CONFINING PRESSURE AND PORE PRESSURE OF ROCK SAMPLE
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摘要: 假设剪切带内部的岩体为剪切破坏,利用剪切应变梯度塑性理论,解析得出了考虑围压和孔隙压力的岩石试件应力与应变的关系,解析解与众多的实验研究结果比较一致,围压效应和孔隙压力效应是局部化所致,这一研究结果对于自然灾害的防治有一定的理论和实际意义。Abstract: Based upon shear strain gradient plastic theory of rock deformation localization, it is assumed that the failure pattern of rock in the shear band is shear failure. The confining pressure and the pore pressure are involved in the model and a theoretical stress strain relationship is obtained. The result of the theoretical analysis coincides with many experimental results. The localization is the cause of the confining pressure and pore pressure. The theoretical analysis has theoretical and practical significance for prevention from some natural hazards.
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Key words:
- strain gradient plastic theory /
- shear failure /
- confining pressure /
- pore pressure /
- localizatim
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