Variable stiffness composite panels:: Effects of stiffness variation on the in-plane and buckling response
Variable stiffness composite panels:: Effects of stiffness variation on the in-plane and buckling response
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DOI：
10.1016/j.compositesa.2007.11.015
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发表时间：
2008-01-01
影响因子：
8.7
通讯作者：
Wu, C. K.
中科院分区：
文献类型：
--
作者：
Gurdal, Z.;Tatting, B. F.;Wu, C. K.
介绍了具有变刚度特性的复合材料矩形平板层合板纤维取向变化的描述。最简单的定义采用基于各层的纤维取向角的线性函数的单向变化。变刚度面板的面内和屈曲响应的分析，并证明了两个不同的情况下的刚度变化。第一种情况假设刚度沿载荷方向变化，数值结果表明，由于横向应力在板平面形状上的良好分布，某些板的屈曲载荷略有改善。第二种情况改变了垂直于载荷的刚度，并且由于所施加载荷的重新分布而提供了更高程度的改善。研究还表明，变刚度概念为设计师提供了在整体面板刚度和屈曲载荷之间进行权衡的灵活性，因为存在许多具有相等屈曲载荷但不同整体刚度值的配置，反之亦然。(C)2007爱思唯尔有限公司保留所有权利。
Descriptions of fiber orientation variation for flat rectangular composite laminates that possess variable stiffness properties are introduced. The simplest definition employs a unidirectional variation based on a linear function for the fiber orientation angle of the individual layers. Analyses of variable stiffness panels for in-plane and buckling responses are developed and demonstrated for two distinct cases of stiffness variations. The first case assumes a stiffness variation in the direction of the loading, and numerical results indicate small improvements in buckling load for some panel configurations due to favorable distribution of the transverse stresses over the panel planform. The second case varies the stiffness perpendicular to the loading, and provides a much higher degree of improvement due to the re-distribution of the applied loads. It is also demonstrated that the variable stiffness concept provides a flexibility to the designer for trade-offs between overall panel stiffness and buckling load, in that there exist many configurations with equal buckling loads yet different global stiffness values, or vice versa. (C) 2007 Elsevier Ltd. All rights reserved.