Finite Element Analysis of Hydro-Mechanical Coupling Effects on Shear Failures of Fully Saturated Collapsible Geomaterials
Finite Element Analysis of Hydro-Mechanical Coupling Effects on Shear Failures of Fully Saturated Collapsible Geomaterials
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完全饱和湿陷岩土材料剪切破坏的水力耦合效应有限元分析
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
J. Ostien
中科院分区：
文献类型：
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作者：
Qiushi Chen;WaiChing Sun;J. Ostien
在砂土、粘土和岩石等多孔岩土材料中发生的完全耦合的扩散-变形过程，在许多岩土工程应用中都是非常重要的。本文将稳定增强应变有限元方法与弹塑性帽模型相结合，模拟了渗流双相可塌多孔岩土材料的关联和非关联流体力学响应。定量分析了孔隙塌陷和颗粒重排引起的宏观塑性响应对孔隙流体渗流的影响，反之亦然。对剪切破坏问题进行有限元模拟，研究孔压消散对多孔岩土材料应力路径和塑性响应的影响。
The fully coupled diffusion-deformation processes occurring within porous geomaterials, such as sand, clay and rock, are of interest to numerous geotechnical engineering applications. In this work, a stabilized enhanced strain finite element procedure for poromechanics is integrated with an elasto-plastic cap model to simulate the associative and non-associative hydro-mechanical responses of fluid- infiltrating biphasic collapsible porous geomaterials. We present a quantitative analysis on how macroscopic plastic response caused by pore collapse and grain rearrangement affects the seepage of pore fluid, and vice versa. Finite element simulations of shear failure problems will be presented to study the effect of pore pressure dissipation on the stress path and plastic response of the porous geomaterials.