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除了对不同温度下冻结砂岩试件剪应变局部化带的形成进行试验研究外,还基于应变软化理论,以FLAC3D自带的Mohr-Coulomb本构模型为基础,对冻结砂岩剪应变局部化带的形成过程进行了数值模拟。结果表明:冻结砂岩单轴抗压强度总体随温度降低而提高,但过低的冻结温度并不能明显提高其强度;冻结砂岩试件剪应变局部化带的形成是一个渐进变化的过程,其最终的破坏形式为剪切破坏,破坏角约为45°。
In addition to experimental studies on the formation of shear strain localized zones in frozen sandstone specimens at different temperatures, based on the strain softening theory and the Mohr-Coulomb constitutive model inherent in FLAC3D, The formation process was numerically simulated. The results show that the uniaxial compressive strength of the frozen sandstone generally increases with the decrease of temperature, but the freezing temperature of the frozen sandstone does not significantly improve the strength of the frozen sandstone. The formation of shear strain localized zone in the frozen sandstone specimen is a gradual change. The damage form is shear failure, destruction angle is about 45 °.