皱褶膜的拉伸诱发皱褶分析和实验验证

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-29 DOI:10.1016/j.tws.2024.112644

Wang Zhong, Baoyan Duan, Jingli Du

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引用次数: 0

摘要

折痕和褶皱是影响膜结构精度的关键因素。本文基于提出的平面折痕模型，将折痕表征为具有有效弯曲刚度和初始应力的正交刚性条带，研究了拉伸引起的折痕膜起皱。推导出带有垂直折痕的拉伸矩形膜起皱的控制方程，以理解折痕与起皱的相互作用。然后，详细讨论了皱褶的一组缩放定律，并得出结论：皱褶的弯曲刚度与膜的弯曲刚度之比是关键的影响因素。此外，分析表明，小应变阶段的起皱是一种局部起皱行为，与折痕参数无关。大应变时的起皱波长和振幅随着折痕角度的增大而减小。最后，实验验证了理论模型和分析方法的正确性和有效性。

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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Stretch-induced wrinkling analysis and experimental validation of creased membranes

Creases and wrinkles are crucial factors affecting the accuracy of membrane structures. In this paper, we study the stretch-induced wrinkling of creased membrane based on a proposed planar crease model by characterizing the crease as an orthotropic rigid strip with effective bending stiffness and initial stress. A control equation of wrinkling of a stretched rectangular membrane with a vertical crease is deduced to understand the crease-wrinkle interaction. Then, a set of scaling laws for the wrinkles is discussed in detail, and it is concluded that the ratio of the bending stiffness of the crease to that of the membrane is the key influence factor. Furthermore, the analysis reveals that wrinkling in the small-strain stage is a localized wrinkling behavior independent of the crease parameters. The wrinkling wavelength and amplitude at large strains decrease with increasing crease angle. Finally, experiments verify the correctness and validity of the theoretical model and analytical method.

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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.