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Mesh-free thermal buckling analysis of multilayered composite plates based on an nth-order shear deformation theory

机译：基于N阶剪切变形理论的多层复合板的无滤网热屈曲分析

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摘要

This study aims at exploring buckling behavior of multilayered composite plates including functionally graded material (FGM) layer in thermal environments by using a mesh-free method. The thermal buckling of the composite plate laminated with FGM layer is formulated by an improved Moving Kriging (MK) meshless method based on an nth-order shear deformation theory which enables the optimal order number to provide the best prediction to be chosen. In the improved MK mesh-free method, the covariance basis function is presented in a compactly supported form to build the shape functions with no fitting parameters. Four types of multilayered composite plates with FGM layer subjected to in-plane and through-thickness temperature changes are considered, and the material properties are both position and temperature dependent. Performance accuracy of the proposed mesh-free method is first confirmed by comparing the computed results with the reference solutions available in the literature, followed by the detailed parametric studies in which the effects of the ingredient fraction, FGM constituents, composition scheme, plate geometric parameter and boundary condition are scrutinized focusing on temperature dependency of the material properties.
机译：该研究旨在通过使用无网状方法探索多层复合板在热环境中包括功能渐变材料（FGM）层的屈曲行为。通过基于n阶剪切变形理论的改进的移动克里格汀（MK）无网格方法来配制与FGM层的复合板的热屈曲，这使得最佳阶数能够提供最佳预测。在改进的MK网格方法中，协方差基础函数以紧凑的支撑形式呈现，以构建没有拟合参数的形状函数。考虑有四种类型的多层复合板，具有对面内和厚度温度变化进行的FGM层，材料特性均为位置和温度依赖性。首先通过将计算的结果与文献中可用的参考解决方案进行比较来证实，首先确认所提出的网眼方法的性能精度，其次是详细的参数研究，其中成分馏分，FGM成分，组成方案，板几何参数的影响和边界条件仔细介绍材料特性的温度依赖性。

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