Stress paths and mechanical behavior of a sandstone in hollow cylinder tests
Stress paths and mechanical behavior of a sandstone in hollow cylinder tests
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DOI：
10.1016/s0148-9062(99)00063-7
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发表时间：
1999-10-01
影响因子：
7.2
通讯作者：
Shieh, WH
中科院分区：
文献类型：
--
作者：
Lee, DH;Juang, CH;Shieh, WH
进行了一系列空心圆柱三轴试验，以研究应力路径对北头砂岩力学行为的潜在影响。测试是通过计算机控制的加载系统进行的。根据预选的应力路径控制施加到样本上的轴向载荷、外部和内部围压以及扭矩。应力路径从主应力空间中的静水应力轴移动并在八面体平面上拉长，同时与主应力轴在八面体平面上的投影保持恒定的角度θ。所提出的空心圆柱体测试被证明能够遵循主应力空间中任何设计的应力路径。因此，它可用于研究应力路径对岩石力学行为的影响并构建其破坏面。 (C) 1999 Elsevier Science Ltd. 保留所有权利。
A series of hollow cylindrical triaxial tests was performed to investigate the potential effect of stress paths on the mechanical behavior of the Pei-Tou sandstone. The tests were carried out with a computer-controlled loading system. The axial loading, outer and inner confining pressures, and torque applied to the specimen were controlled according to a preselected stress path. The stress path moved from the hydrostatic stress axis in principal-stress space and elongated on an octahedral plane, while maintaining a constant angle theta against the projection of the major principal stress axis on the octahedral plane. The proposed hollow cylinder test is shown to be able to follow any designed stress paths in the principal stress space. Thus, it may be used to investigate the effect of stress paths on the mechanical behavior of rock and to construct its failure surface. (C) 1999 Elsevier Science Ltd. All rights reserved.