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阐述一维高应力及重复冲击共同作用下岩石的本构模型研究的意义。采用组合模型研究方法,将岩石单元看成一个弹性元件和一个黏性元件串联后与损伤体Da1并联,最后与损伤体Da2串联,构成岩石单元组合体力学模型,推出一维高应力及重复冲击共同作用下岩石的本构方程。针对建立的本构模型,设计矽卡岩、蛇纹岩在一维高应力及重复冲击共同作用下的岩石力学试验,试验结果得出,峰值应力前动态应力–应变曲线变化的趋势一致,没有压密阶段,仅有弹性阶段、非线性变形阶段,峰值应力后出现回弹、不回弹2种现象。借助试验结果对建立的本构模型进行验证,结果表明建立的本构方程的拟合曲线和试验曲线具有很好的一致性。
The significance of the research on the constitutive model of rocks under one-dimensional high stress and repeated impact is described. Using the method of combinatorial model, the rock element is regarded as an elastic element and a viscous element connected in series with the Da1, and then connected in series with the Da2, to form the mechanical model of the rock element assembly. One-dimensional high stress and repeated impact The Constitutive Equation of Rock under the Combined Action. According to the established constitutive model, the rock mechanics tests of skarn and serpentinite under one-dimensional high-stress and repeated impact are designed. The experimental results show that the trend of dynamic stress-strain curve before peak stress is the same, without Compression stage, only the elastic stage, the nonlinear deformation stage, after the peak stress rebound, do not rebound two kinds of phenomena. With the test results, the established constitutive model is validated. The results show that the fitting curve and the test curve of the established constitutive equation have good consistency.