Buckling analysis of moderately thick carbon fiber composite cylindrical shells under hydrostatic pressure

IF 4.3 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research Pub Date : 2024-10-21 DOI:10.1016/j.apor.2024.104272

Fanglin Cong , Runbo Zhang , Wendong Li , Yang Jin , Guocai Yu , Linzhi Wu

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引用次数: 0

Abstract

Cylindrical shell structures are widely used in various engineering fields. In this study, the hydrostatic buckling behavior of moderately thick composite cylindrical shells is studied. A theoretical model based on the first-order shear deformation theory is established and its validity was verified by comparison with experimental data. Furthermore, the failure mechanism of moderately thick cylindrical shell is analyzed by experiments and simulations. It is analytically confirmed that the failure mode of moderately thick cylindrical shells changes as the length-to-radius ratio and the radius-to-thickness ratio decreases. Subsequently, the effects of size, stacking sequence, and ply angle on buckling behavior are discussed and parameter optimization is implemented analytically for engineering design. The results indicate that the critical hydrostatic buckling strength increases by more than 18.55 % by parameter optimization. The research results provide a useful reference for the design and optimization of underwater pressure-resistant shells.

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静水压力下中等厚度碳纤维复合材料圆柱壳的屈曲分析

圆柱形壳体结构广泛应用于各种工程领域。本研究对中等厚度复合材料圆柱壳的静水屈曲行为进行了研究。建立了基于一阶剪切变形理论的理论模型，并通过与实验数据的对比验证了模型的有效性。此外，还通过实验和模拟分析了中等厚度圆柱壳的失效机理。分析证实，中厚圆柱形壳体的破坏模式随着长径比和半径厚比的减小而改变。随后，讨论了尺寸、堆叠顺序和层角对屈曲行为的影响，并通过分析实现了工程设计中的参数优化。结果表明，通过参数优化，临界静水屈曲强度提高了 18.55 % 以上。研究结果为水下耐压壳体的设计和优化提供了有益的参考。

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来源期刊

Applied Ocean Research 地学-工程：大洋

CiteScore

8.70

自引率

7.00%

发文量

316

审稿时长

59 days

期刊介绍： The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.