Abstract This study intends to model the effect of porosity type defect and analyze the consequences of porosity on the buckling characteristic of various types of FGM sandwich combinations. Here, we consider four types of FGM sandwich combinations considering the multiple arrangements of the constituent layers (i.e., two face sheets and a core). Further, the combinations of all kinds of sandwiches are considered in such a way that there is no material discontinuity or jump. The porosity defects are modeled in this work as the criteria of stiffness reduction and incorporated in the rule of mixture. Finally, results are calculated by considering two types of porosity distribution, evenly and unevenly, while modeling the FGM plate. The buckling response of FGM sandwich plates has been analyzed under a nonuniform in-plane edge load. The application of nonuniform in-plane loads causes in-plane stresses to be nonlinear. Hence, in-plane stresses need to be calculated apriori for the buckling study of the FGM plate under nonuniform load. Further, the effects of various parameters like porosity contents, sandwich combinations, aspect ratio, thickness ratio, boundary conditions on buckling load of FGM plate have been studied in this paper.

中文翻译：

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基于高阶剪切变形理论的多孔FGM夹层板在各种类型非均匀边缘压缩下的屈曲分析

摘要 本研究旨在模拟孔隙度类型缺陷的影响，并分析孔隙度对各类 FGM 夹层组合屈曲特性的影响。在这里，我们考虑四种类型的 FGM 夹层组合，考虑到组成层的多种排列（即，两个面板和一个核心）。此外，各种三明治的组合以没有材料不连续或跳跃的方式被考虑。在这项工作中，孔隙度缺陷被建模为刚度降低的标准，并纳入混合规则。最后，在对 FGM 板进行建模时，通过考虑两种类型的孔隙率分布（均匀和不均匀）来计算结果。FGM 夹层板的屈曲响应已经在非均匀的面内边缘载荷下进行了分析。非均匀面内载荷的应用导致面内应力呈非线性。因此，需要预先计算面内应力，以进行非均匀载荷下 FGM 板的屈曲研究。此外，本文还研究了孔隙率、夹层组合、纵横比、厚度比、边界条件等各种参数对 FGM 板屈曲载荷的影响。