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Anisotropic failure criterion for soils based on equivalent stress tensor

机译：基于等效应力张量的各向异性各向异性破坏准则

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摘要

Experimental evidence shows that both the inherent anisotropy and the loading direction have a considerable influence on the failure of geomaterials. Based on a micro-macro analysis of soil skeletons, the equivalent stress tensor is extracted from the equilibrium equation to measure the joint effect of the fabric tensor and the stress tensor. Using the equivalent stress tensor, an anisotropic failure criterion is proposed which combines the magnitude and the direction of the effective stress together with the microscopic characteristics of anisotropy. With the parameters determined by conventional laboratory tests, the predicted results are compared with the experimental results using various stress paths obtained from the literature. The results show that the anisotropic failure criterion is reliable and accurate for both true triaxial tests and torsional shear tests. Finally, the possible applications of the equivalent stress and the improvements necessary for the anisotropic failure criterion are discussed. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：实验证据表明，固有各向异性和载荷方向都对土工材料的破坏有很大影响。基于土壤骨架的宏观分析，从平衡方程中提取等效应力张量，以测量织物张量和应力张量的联合效应。利用等效应力张量，提出了一种各向异性破坏准则，该准则将有效应力的大小和方向与各向异性的微观特征相结合。通过常规实验室测试确定的参数，将预测结果与使用从文献中获得的各种应力路径的实验结果进行比较。结果表明，对于真正的三轴试验和扭转剪切试验，各向异性破坏准则是可靠和准确的。最后，讨论了等效应力的可能应用以及各向异性破坏准则所必需的改进。 （C）2019年由Elsevier B.V.代表日本岩土工程学会制作和主持。

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  • 来源
    《Soils and foundations》 |2019年第3期|644-656|共13页
  • 作者

    Dong Tong; Kong Liang; Zhe Mei; Zheng Yingren;

  • 作者单位

    Peoples Liberat Army Acad Mil Sci Inst Def Engn 22nd Taiping Rode Beijing Peoples R China|Army Logist Univ PLA Chongqing Key Lab Geomech & Geoenvironm Protect Chongqing 401311 Peoples R China;

    Qingdao Univ Technol Sch Sci 11 FuShun Rd Qingdao 266033 Shandong Peoples R China;

    Peoples Liberat Army Acad Mil Sci Inst Def Engn 22nd Taiping Rode Beijing Peoples R China;

    Army Logist Univ Chongqing Key Lab Geomech & Geoenvironm Protect Chongqing 401311 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Anisotropy; Equivalent stress tensor; Failure criterion; Principal stress axes directions;

    机译：各向异性等效应力张量;失效标准;主应力轴方向;

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