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首页> 外文期刊>Applied Mathematical Modelling >An analytical approach for postbuckling of eccentrically or concentrically stiffened composite double curved panel on nonlinear elastic foundation
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An analytical approach for postbuckling of eccentrically or concentrically stiffened composite double curved panel on nonlinear elastic foundation

机译：非线性弹性地基上偏心或同心加筋的复合双曲面板的后屈曲分析方法

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摘要

This paper presents a detailed analytical investigation on the buckling and postbuckling behavior of laminated composite double curved panels with eccentrically and/or concentrically ortho-grid stiffeners subjected to in-plane compression, lateral pressure, thermal environment, and combined loads. The panels are surrounded by three parameter elastic foundations. Different types of simple-supported boundary conditions are considered. The equilibrium and compatibility equations of panel are derived based on Kirchhoff assumptions incorporating nonlinear von-Karman relations. The stress function and Galerkin method are applied to obtain explicit expressions of the buckling load and load-deflection relations. New results are presented to show effects of the combined loads, position of stiffener, and elastic foundation. As a key finding of these results, the buckling load and the postbuckling curves of concentrically stiffened panels are higher than eccentrically stiffened panels.
机译：本文对偏心和/或同心正交格栅加劲肋的层压复合双曲面板在平面内压缩，侧向压力，热环境和组合载荷作用下的屈曲和后屈曲行为进行了详细的分析研究。面板被三个参数弹性基础包围。考虑了不同类型的简单支持边界条件。面板的平衡和相容性方程是基于结合了非线性von-Karman关系的Kirchhoff假设而得出的。应用应力函数和Galerkin方法获得屈曲载荷和载荷-挠度关系的明确表达式。提出了新结果，以显示组合载荷，加劲肋位置和弹性基础的影响。这些结果的关键发现是，同心加劲板的屈曲载荷和后屈曲曲线高于偏心加劲板。

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