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首页> 外文期刊>Composite Structures >Postbuckling of functionally graded fiber reinforced composite laminated cylindrical shells, Part I: Theory and solutions
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Postbuckling of functionally graded fiber reinforced composite laminated cylindrical shells, Part I: Theory and solutions

机译：功能梯度纤维增强复合材料叠层圆柱壳的后屈曲，第一部分：理论和解决方案

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摘要

Buckling and postbuckling behavior are presented for fiber reinforced composite (FRC) laminated cylindrical shells subjected to axial compression or a uniform external pressure in thermal environments. Two kinds of fiber reinforced composite laminated shells, namely, uniformly distributed (UD) and functionally graded (FG) reinforcements, are considered. The governing equations are based on a higher order shear deformation shell theory with von Karman-type of kinematic non-linearity and including the extension-twist, extension-flexural and flexural-twist couplings. The thermal effects are also included, and the material properties of FRC laminated cylindrical shells are estimated through a micromechanical model and are assumed to be temperature dependent. The non-linear prebuckling deformations and the initial geometric imperfections of the shell are both taken into account. A singular perturbation technique is employed to determine the buckling loads and postbuckling equilibrium paths of FRC laminated cylindrical shells.
机译：提出了纤维增强复合材料（FRC）层压圆柱壳在热环境中经受轴向压缩或均匀外部压力时的屈曲和后屈曲行为。考虑了两种纤维增强复合材料叠层壳，即均匀分布（UD）和功能梯度（FG）增强件。控制方程基于具有非线性运动学非线性的von Karman型的高阶剪切变形壳理论，包括拉伸扭转，拉伸挠曲和挠曲扭转耦合。还包括热效应，并通过微力学模型估算了FRC层压圆柱壳的材料性能，并假定其与温度有关。都考虑了壳体的非线性预屈曲变形和初始几何缺陷。采用奇异摄动技术确定FRC叠层圆柱壳的屈曲载荷和屈曲后的平衡路径。

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