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首页> 外文会议>IUYAM Symposium on Theoretical and Numerical Methods in Continuum Mechanics of Porous Materials, Sep 5-10, 1999, Stuttgart, Germany >Modelling of Localisation at Finite Inelastic Strains in Fluid Saturated Porous Media
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Modelling of Localisation at Finite Inelastic Strains in Fluid Saturated Porous Media

机译：流体饱和多孔介质中有限弹性应变局部化模型

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摘要

Quasi-static finite strain localisation phenomena in fluid saturated soils are studied. The governing equations at the macroscopic level are derived in a spatial and a material setting. The constituents are assumed to be materially incompressible. The elasto-plastic behaviour of the solid skeleton is described by the multiplicative decomposition of the deformation gradient into an elastic and a plastic part. The effective stress state is limited by the Drucker-Prager yield surface. A particular "apex formulation" is advocated. The fluid is assumed to obey Darcy's law. Numerical examples highlight the developments. Negative water pressures, which are important for strain localisation analysis of undrained water saturated dense sands, are obtained and their values are critically discussed.
机译：研究了流体饱和土中的准静态有限应变局部化现象。宏观层次上的控制方程是在空间和材料设置中得出的。假定这些成分是材料上不可压缩的。固体骨架的弹塑性行为通过将变形梯度分解为弹性和塑性部分来描述。有效应力状态受Drucker-Prager屈服面的限制。提倡一种特殊的“顶点配方”。假定流体遵循达西定律。数值示例突出了事态发展。获得了负水压，这对于不排水的饱和水密实砂土的应变局部化分析非常重要，并对它们的值进行了严格讨论。

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