文献类型：期刊文献

英文题名：Wrinkling of twisted thin films

作者：Wang, Fan-Fan[1];Wang, Ting[2];Zhang, Xiaoliang[2];Huang, Yangchao[2];Giorgio, Ivan[3];Xu, Fan[2]

机构：[1]East China Univ Sci & Technol, Sch Math, Shanghai 200237, Peoples R China;[2]Fudan Univ, Inst Mech & Computat Engn, Dept Aeronaut & Astronaut, Shanghai 200433, Peoples R China;[3]Univ Laquila, Dept Civil Construct Architectural & Environm Engn, Laquila, Italy

年份：2023

卷号：262-263

外文期刊名：INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

收录：;EI(收录号：20225013255608);WOS:【SCI-EXPANDED(收录号:WOS:000906679300001)】；

基金：F.X. acknowledges the financial supports from the National Natural Science Foundation of China (Grants No. 12122204 and 11872150) , Shanghai Pilot Program for Basic Research-Fudan University (Grant No. 21TQ1400100-21TQ010) , Shanghai Shuguang Program (Grant No. 21SG05) , and young scientist project of MOE innovation platform.

语种：英文

外文关键词：Wrinkling; Twist; Bifurcation; Finite-strain plate model; Thin films

摘要：Thin films usually exhibit instabilities and yield intricate wrinkles when two clamped ends are twisted. Here, we explore the wrinkling behavior and pitch-fork bifurcation of twisted thin films experimentally and theoretically. To quantitatively predict the post-buckling evolution of twist-induced wrinkling morphology, we develop a refined finite-strain plate model derived from 3D field equations and then solve it by using the finite element method with COMSOL. We examine the effects of aspect ratios and pre-tension on the wrinkling profile. We reveal three distinguished wrinkling evolution regimes depending on the aspect ratios of thin films as the twisting angle increases: (a) wrinkles initially occur at both free ends of the film and then develop toward the center; (b) wrinkles appear at the center and then develop toward both free ends; (c) wrinkles emerge at the center and are localized therein. The increase of film thickness and pre-stretch can strengthen the film stiffness and thus increase the critical twisting threshold, resulting in the prevention of wrinkle formation. Understanding the morphological pattern evolution of twisted films may guide rational designs of wrinkle-tunable membrane surfaces and structures.