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带椭圆形切口的张紧层压复合板抗屈曲材料设计中的特性

Peculiarities in the Material Design of Buckling Resistance for Tensioned Laminated Composite Panels with Elliptical Cut-Outs.

作者信息

Muc Aleksander

机构信息

Institute of Machine Design, Cracow University of Technology, ul. Warszawska 24, 31-155 Kraków, Poland.

出版信息

Materials (Basel). 2018 Jun 15;11(6):1019. doi: 10.3390/ma11061019.

DOI:10.3390/ma11061019
PMID:29914067
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6025087/
Abstract

The results of analytical and numerical studies of the buckling behavior of laminated multilayered tensioned sheets with circular and elliptical openings are presented. The analysis shows the significant influence of stress concentration effects on buckling modes and loads, particularly taking into consideration variations in the ₁/₂ and ₁/ ratios. The results of finite element (FE) computations prove that the buckling mode cannot be described by a single buckle localized at the apex of the hole. The optimal design of such structures seems to be much more complicated than classical buckling problems of compressed laminated panels without holes. However, the obtained results indicate that the optimal laminate configurations occur at the boundaries of the feasible regions of the introduced design space. Both continuous and discrete fibre orientations are considered. For continuous fibre orientations, the optimal stacking sequence corresponds to angle-ply symmetric laminates.

摘要

给出了具有圆形和椭圆形开口的层合多层张紧板屈曲行为的分析和数值研究结果。分析表明，应力集中效应对应屈曲模式和载荷有显著影响，特别是考虑到₁/₂和₁/比的变化时。有限元（FE）计算结果证明，屈曲模式不能用位于孔顶点的单个屈曲来描述。这种结构的优化设计似乎比无孔压缩层合板的经典屈曲问题要复杂得多。然而，所得结果表明，最优层合配置出现在引入设计空间的可行区域边界。同时考虑了连续和离散纤维取向。对于连续纤维取向，最优铺层顺序对应于角铺设对称层合板。

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