An anisotropic failure criterion for geomaterials

GAO Zhi-wei; ZHAO Ji-dong; YAO Yang-ping

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An anisotropic failure criterion for geomaterials

更新时间：2026-06-25

- An anisotropic failure criterion for geomaterials
- Vol. 32, Issue S1, (2011)
- 作者机构：
  
  1. 香港科技大学土木与环境工程系，香港九龙
  2. 北京航空航天大学土木工程系,北京,100191
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：16 May 2011，
  
  Published：2011
- 稿件说明：
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GAO Zhi-wei, ZHAO Ji-dong, YAO Yang-ping. An anisotropic failure criterion for geomaterials[J]. 2011, 32(S1).
DOI：

GAO Zhi-wei, ZHAO Ji-dong, YAO Yang-ping. An anisotropic failure criterion for geomaterials[J]. 2011, 32(S1). DOI：

摘要

岩土材料的强度往往表现出很强的各向异性，而已有的各向同性强度准则不能够描述这一特性。提出一个岩土材料的各向异性强度准则。为了描述材料的各向异性，引入了一个由应力张量和组构张量的联合不变量表达的各向异性参数。该参数可以描述加载方向和材料组构方向的夹角。强度准则是基于材料在子午面和偏平面上的破坏特性而建立的，这为描述广义的材料强度各向异性提供了方便。与原各向同性强度准则相比，各向异性强度准则只引入了两个新的模型参数，而且所有的模型参数都可以通过常规的室内试验结果确定。该准则的预测结果与砂土、黏土、天然黏土和岩石的试验结果比较表明，它能够很好地描述岩土材料强度的各向异性

Abstract

The strength of geomaterials is strongly influenced by their fabric anisotropy

which can not be characterized by the isotropic failure criterion reasonably. A general anisotropic failure criterion is proposed. To characterize relative orientation between the loading direction and material fabric

an anisotropic variable expressed by the joint invariants of the stress tensor and fabric tensor is introduced. The failure criterion is developed based on the failure characteristics of geomaterials in both the meridian plane and deviatoric plane

which leads to a general three-dimensional description of strength anisotropy. Compared with the isotropic failure criterion

only two new parameters are introduced in the anisotropic one. All the model parameters can be readily calibrated based on the conventional laboratory tests. Comparison between the model predictions with the test results on sand

clay

natural clay as well as rock demonstrates that the new criterion can characterize the strength anisotropy of geomaterials in a reasonable manner.

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