An Elasto-plastic Model and Its Return Mapping Scheme for Anisotropic Rocks

机译：各向异性岩石的弹塑性模型及其返回映射方案

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Based on an anisotropic failure criterion that includes a scalar parameter in terms of the mixed invariants of the stress and micro-structure tensors,an elasto-plastic model is suggested for the description of mechanical properties of transversely isotropic rocks.And on the basic principles of return mapping,we deduce the formulations of return mapping suit for transversely isotropic rocks,especially the second derivative of plastic potential function and unsymmetrical consistent constitutive matrix.For application,an experimental program is conducted and several tests of argillite specimens are simulated with various confining pressures and loading orientations.The comparison reveals that the proposed model and its return mapping scheme are suitable for describing the mechanical properties of argillite.

机译：基于包含应力和微观结构张量的混合不变量的标量参数的各向异性破坏准则，提出了一种弹塑性模型来描述横观各向同性岩石的力学特性。回波作图，我们推导了横观各向同性岩石的回波作图公式，特别是塑性势函数和非对称一致本构矩阵的二阶导数。为进行应用，进行了一个实验程序，并在不同围压下模拟了多个泥塑试样的测试。比较结果表明，所提出的模型及其返回映射方案适用于描述斜长石的力学性能。

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来源
《Constitutive modeling of geomaterials : advances and new applications》|2012年|371-380|共10页
会议地点 Beijing(CN)
作者
Wei-ya Xu; Jiu-chang Zhang; Ru-bin Wang; Jin-jian Gu;
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作者单位

Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China;

Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China;

Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China;

Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China;

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会议组织
原文格式 PDF
正文语种 eng
中图分类土力学、地基基础工程;
关键词
Anisotropy; Elasto-plasticity; Micro-structure tensor; Return mapping;

机译：各向异性;弹塑性;微结构张量;返回映射;

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An Elasto-plastic Model and Its Return Mapping Scheme for Anisotropic Rocks

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