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

摘要：

　　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.

关键词： Anisotropy Elasto-plasticity Micro-structure tensor Return mapping

作者: Wei-ya Xu Jiu-chang Zhang Ru-bin Wang Jin-jian Gu

作者单位: Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China

会议类型: 国际会议

会议名称: The Second International Symposium on Constitutive Modeling of Geomaterials: Advances and New Applications (第二届国际岩土本构模型研讨会(IS-Model 2012))

会议地点: 北京

会议语种:英文

页码: 371-380

在线出版日期: 2012-10-15（万方平台首次上网日期，不代表论文的发表时间）