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Micropolar approach on the porous medium plasticity with equivalent couple stress

机译：等效耦合应力下微孔法研究多孔介质的塑性

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The meso-level structure characters of porous medium show strong effect on its macro-levelmechanical behaviors. This paper focuses on the application of micropolar continuum-based theoryto study the mechanical behaviors of porous medium. Different from the classical Cauchy-typecontinuum mechanics, the independent rotation of each continuum point is allowed. In addition tothe ordinary stresses, the effective couple stress of its representative micro-structure elements is alsointroduced. The model of an effective medium is considered for description of plastic deformation.This effective micropolar model does show its capability to describe the meso-level effect on thecompression response of porous medium. With the additional degrees of freedom, this method canbe considered as a non-local theory which is an interesting research tool for the size effect of porousmedium. Its further application on the description of post-yield behavior is also discussed.
机译：多孔介质的中观结构特征对其宏观力学行为表现出强烈的影响。本文重点研究基于微极性连续体的理论在研究多孔介质的力学行为方面的应用。与经典柯西式连续谱力学不同，每个连续点的独立旋转是允许的。除了常应力外，还介绍了其代表性的微结构元素的有效耦合应力。考虑到一种有效的介质模型来描述塑性变形。该有效的微极性模型的确显示了其描述介孔水平对多孔介质压缩响应的影响的能力。由于具有额外的自由度，因此该方法可以被视为非局部理论，这是研究多孔介质尺寸效应的有趣工具。还讨论了其在后屈服行为描述中的进一步应用。

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