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基于岩石的强度随机统计分布的特点及应变强度理论,应用损伤力学的相关知识,考虑微原体破坏及弹性模量与温度间的非线性关系,建立了单轴压缩条件下粗砂岩温度热损伤后统计本构模型。然后采用伺服试验机对经历了高温烘烤冷却后的粗砂岩试件进行了单轴压缩试验,并根据试验结果对粗砂岩力学参数与温度间的关系进行了讨论,给出了考虑温度热损伤的统计本构模型参数。通过与单轴压缩实验结果相对比,显示了所建模型的合理性。
Based on the characteristics of stochastic statistical distribution of rock strength and the theory of strain strength, the thermal damage of coarse sandstone under uniaxial compression was established by applying the knowledge of damage mechanics, taking into account the damage of micropores and the nonlinear relationship between elastic modulus and temperature. Post Statistical Constitutive Model. Then the uniaxial compression test was carried out on the coarse sandstone specimens after the high temperature bake and cooling by the servo testing machine. According to the test results, the relationship between the mechanical parameters of the coarse sandstone and the temperature was discussed. Statistical constitutive model parameters. Compared with the uniaxial compression experiment results, the rationality of the model is shown.