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首页> 外文期刊>Rock Mechanics and Rock Engineering >Finite Deformation Analysis on Sandstone Subjected to Thermo-Hydro-Mechanical (T-H-M) Coupling
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Finite Deformation Analysis on Sandstone Subjected to Thermo-Hydro-Mechanical (T-H-M) Coupling

机译：热-水-力（T-H-M）耦合作用下砂岩的有限变形分析

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摘要

Temperature, water, and confining pressure are crucial environmental factors affecting rock strength and deformability. In this work, temperature-water-confining pressure coupled compression experiments were conducted on sandstone. The effects of each influencing factor on rock strength and deformability are statistically analyzed and discussed. The results suggest that the confining pressure has the most significant effects on the Young's modulus, Poisson's ratio, and peak stress, whereas temperature has the least effect on these three parameters under the present test conditions. The evolution of the Young's modulus, Poisson's ratio, and peak strength under the influence of the three environmental factors is also studied, from which linear correlations of those parameters with the three factors are obtained. In addition to the parametric study, finite deformation theory and the mean rotation angle are employed to analyze the nonlinear deformation behavior of the test rock, which cannot be comprehensively described by the Young's modulus and Poisson's ratio alone. The evolution of the mean rotation angle with respect to stress, strain, and tangent modulus is studied and discussed. A constitutive model based on the mean rotation angle and finite deformation theory is also proposed.
机译：温度，水和围压是影响岩石强度和变形性的关键环境因素。在这项工作中，在砂岩上进行了温度-水限制压力耦合的压缩实验。统计分析和讨论了每个影响因素对岩石强度和变形性的影响。结果表明，在当前测试条件下，围压对杨氏模量，泊松比和峰值应力的影响最大，而温度对这三个参数的影响最小。还研究了在三个环境因素的影响下杨氏模量，泊松比和峰强度的演化，从而获得了这些参数与三个因素的线性关系。除了参数研究外，还采用有限变形理论和平均旋转角度来分析试验岩石的非线性变形行为，仅靠杨氏模量和泊松比不能全面地描述非线性变形行为。研究并讨论了平均旋转角相对于应力，应变和切线模量的演变。提出了基于平均旋转角度和有限变形理论的本构模型。

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