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简化微观形态模型内平面的分析

Analysis of planes within reduced micromorphic model.

作者信息

Dhaba A R El, Mousavi S Mahmoud

机构信息

Department of Mathematics, Faculty of Science, Damanhour University, Damanhour, Egypt.

Division of Applied Mechanics, Department of Materials Science and Engineering, Uppsala University, P.O. Box 534, 751 21, Uppsala, Sweden.

出版信息

Sci Rep. 2021 Jul 30;11(1):15537. doi: 10.1038/s41598-021-94912-z.

Abstract

A plane within reduced micromorphic model subjected to external static load is studied using the finite element method. The reduced micromorphic model is a generalized continuum theory which can be used to capture the interaction of the microstructure. In this approach, the microstructure is homogenized and replaced by a reduced micromorphic material model. Then, avoiding the complexity of the microstructure, the reduced micromorphic model is analyzed to reveal the interaction of the microstructure and the external loading. In this study, the three-dimensional formulation of the reduced micromorphic model is dimensionally reduced to address a plane under in-plane external load. The governing system of partial differential equations with corresponding consistent boundary conditions are discretized and solved using the finite element method. The classical and nonclassical deformation measures are then demonstrated and discussed for the first time for a material employing the reduced micromorphic model.

摘要

采用有限元方法研究了承受外部静载的简化微形态模型中的一个平面。简化微形态模型是一种广义连续体理论,可用于描述微观结构的相互作用。在这种方法中,微观结构被均匀化并用简化微形态材料模型代替。然后,避开微观结构的复杂性,对简化微形态模型进行分析以揭示微观结构与外部载荷的相互作用。在本研究中,将简化微形态模型的三维公式进行降维,以处理平面内外部载荷作用下的一个平面。具有相应一致边界条件的偏微分方程控制体系通过有限元方法进行离散化和求解。然后,首次针对采用简化微形态模型的材料展示并讨论了经典和非经典变形度量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4bf9/8324775/fec59fd7c4c9/41598_2021_94912_Fig1_HTML.jpg

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