Experimental study on the buckling of composite cylinders with reinforced circular hole under hydrostatic pressure

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术) Pub Date : 2025-02-01 DOI:10.1016/j.dt.2024.10.002

Zhun Li , Xinhu Zhang , Kechun Shen , Jing Liu , Jian Zhang , Guang Pan

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Abstract

In this paper, a type of reinforcing structure for composite shell with single and through hole is presented. The experimental tests for the composite shells without hole, with single hole and reinforced structure, with through hole and reinforced structure subjected to hydrostatic pressure were carried out by the designed experimental test system. The mechanical responses of the composite shells under hydrostatic pressure are obtained by the high-speed camera and strain measurement. The results show that the entire deformation process of the shell can be divided into three: uniform compression, "buckling mode formation" and buckling. The "buckling mode formation" process is captured and reported for the first time. For the composite shell with single hole, the proposed reinforcing structure has a significant reinforcement effect on the shell and the buckling capacity of the shell is not weaker than the complete composite shell. For the composite shell with through hole, sealing effect can be achieved by the proposed reinforcing structure, but the buckling capacity of the shell after reinforcement can only reach 77% of the original buckling capacity.

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加筋圆孔复合材料圆柱体在静水压力下屈曲的实验研究

本文提出了一种单孔和通孔复合壳体的加固结构。利用设计的试验系统进行了无孔、单孔和加筋结构、通孔和加筋结构复合材料壳在静水压力作用下的试验试验。利用高速摄像机和应变测量技术，获得了复合材料壳体在静水压力作用下的力学响应。结果表明：壳体的整个变形过程可分为均匀压缩、“屈曲模态形成”和屈曲三个阶段；“屈曲模式形成”过程首次被捕获和报道。对于单孔复合材料壳，所提出的加固结构对壳具有显著的加固效果，且壳的屈曲能力不弱于完整的复合材料壳。对于带通孔的复合壳，本文提出的加固结构可以达到密封效果，但加固后的壳屈曲能力只能达到原屈曲能力的77%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering

CiteScore

8.70

自引率

0.00%

发文量

728

审稿时长

25 days

期刊介绍： Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.