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首页> 外文会议>Second Biot Conference on Poromechanics Aug 26-28, 2002 Grenoble, France >Micromechanical approach to the modelling of compaction at large strains
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Micromechanical approach to the modelling of compaction at large strains

机译：大变形压实建模的微力学方法

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摘要

The compaction law at large strains represents the evolution of the loading to which the geoma-terial is subjected while its microstructure is being modified. It is shown, on the example of the hollow sphere, that this loading can be calculated by means of a yield design technique on the current configuration if the matrix is elastic perfectly plastic of Von Mises' type. The actual behavior of the matrix is then replaced by a non linear elastic one so as to use the non linear homogenization theory to reach the limit load in a given configuration. As the non linear homogenization technique is based on the determination of effective properties of the matrix, the results can be improved by considering a relevant partition of the matrix.
机译：大应变下的压实定律代表了在对其微观结构进行修改的同时，该材料受到的载荷的变化。在中空球体的示例中显示，如果基体是冯·米塞斯（Von Mises）类型的完全塑性的弹性体，则可以通过当前结构上的屈服设计技术来计算此载荷。然后，将矩阵的实际行为替换为非线性弹性变量，以便使用非线性均质化理论在给定配置中达到极限载荷。由于非线性均质化技术基于确定基质的有效特性，因此可以通过考虑基质的相关分配来改善结果。

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