Thin-walled single and multi-cell CFRP composite tubes in uniform torsion–Local shear and distortional-torsional instability

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-01-22 DOI:10.1016/j.tws.2025.112998

J. Loughlan , N.B. Yidris

引用次数: 0

Abstract

The buckling performance of thin-walled single and multi-cell CFRP composite tubes in uniform torsion is examined in this paper using both the finite strip and finite element methods of analysis. Due consideration is given in the paper to the influence on performance of flexural anisotropy or the bend-twist coupling characteristics of the composite material. The paper highlights the importance of realising the significance of the applied torque direction on buckling performance. Markedly different stability levels are shown to be in existence for the clockwise and anticlockwise torsional loading cases of the thin-walled multi-cell CFRP composite tubes. This situation is, of course, not realised in isotropic metal construction or in specially orthotropic CFRP composite construction since such material systems are devoid of the effects of material flexural anisotropy and thus the significance of the applied torque direction in this case is no longer appropriate.

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本文采用有限条带和有限元分析方法研究了薄壁单孔和多孔 CFRP 复合管在均匀扭转情况下的屈曲性能。文中适当考虑了复合材料的弯曲各向异性或弯曲-扭转耦合特性对性能的影响。论文强调了认识到施加扭矩方向对屈曲性能影响的重要性。研究表明，薄壁多孔 CFRP 复合材料管在顺时针和逆时针扭转加载情况下存在明显不同的稳定性水平。当然，这种情况在各向同性的金属结构或特别正交的 CFRP 复合材料结构中是无法实现的，因为这类材料系统不存在材料挠曲各向异性的影响，因此在这种情况下施加扭矩方向的重要性不再适用。

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

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.