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首页> 外文期刊>Composite Structures >Nonlinear postbuckling of imperfect eccentrically stiffened P-FGM double curved thin shallow shells on elastic foundations in thermal environments
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Nonlinear postbuckling of imperfect eccentrically stiffened P-FGM double curved thin shallow shells on elastic foundations in thermal environments

机译：热环境中弹性地基上不完善的偏心刚度P-FGM双曲薄扁壳的非线性后屈曲

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摘要

This paper first time presents an analytical investigation on the nonlinear postbuckling for imperfect eccentrically stiffened FGM double curved thin shallow shells on elastic foundation using a simple power-law distribution (P-FGM) in thermal environments. The formulations are based on the classical shell theory taking into account geometrical nonlinearity, initial geometrical imperfection, temperature-dependent properties and the Lekhnitsky smeared stiffeners technique with Pasternak type elastic foundation. By applying Galerkin method and using stress function, explicit relations of thermal load-deflection curves for simply supported curved eccentrically stiffened FGM shells are determined. Effects of material and geometrical properties, temperature, elastic foundation and eccentrically stiffeners on the buckling and postbuckling loading capacity of the imperfect eccentrically stiffened P-FGM double curved shallow shells in thermal environments are analyzed and discussed.
机译：本文首次在热环境中使用简单的幂律分布（P-FGM）对弹性地基上不完善的偏心加筋的FGM双弯曲薄壁薄壳进行非线性后屈曲分析。这些配方基于经典壳理论，考虑了几何非线性，初始几何缺陷，温度相关的特性以及带有Pasternak型弹性基础的Lekhnitsky涂抹加强筋技术。通过应用Galerkin方法并利用应力函数，确定了简单支撑的弯曲偏心加筋的FGM壳体的热负荷-挠度曲线的明确关系。分析并讨论了材料和几何特性，温度，弹性基础和偏心加劲肋对不理想的偏心加劲的P-FGM双曲浅壳在热环境中的屈曲和屈曲后承载能力的影响。

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