柔性衬底/刚性薄膜应力褶皱有序结构形成的动态过程  

Dynamic formation of stressed ordered wrinkle on compliant substrate/stiff film

作　　者：李超荣[1] 徐庆[1] 鲁年鹏[2] 董文钧[1] 曹则贤[2] 

机构地区：[1]浙江理工大学物理系和先进纺织材料与制备技术教育部重点实验室,杭州310018 [2]中国科学院物理研究所,北京100190

出　　处：《中国科学：物理学、力学、天文学》2012年第9期934-940,共7页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:91122022;10874153;51172209;50972130);浙江理工大学科研启动基金(编号:0713037)资助项目

摘　　要：对于柔性衬底/刚性薄膜系统,当应力超过临界值时,通常会产生无序皱褶.本文在PDMS衬底/Pt薄膜系统中,通过预制边界条件实现了皱褶图案的有序化排列,并针对其详细过程进行了系统研究.基于30°C降温至0°C的温差系统,实时观察褶皱有序结构形成与演化动态过程.根据力学原理分析,研究了褶皱起源和生长,缺陷形成和演化规律,以及褶皱波长和振幅随温度的变化情况.其结果对形成大面积高度有序的褶皱花样具有一定的指导意义.A compliant substrate/stiff film stressed system usually forms disordered wrinkle when the stress exceeds critical value. In this paper, the ordered one-dimensional wrinkle patterns were realized by the prefabricated boundaries in the PDMS substrate/Pt film system. Meanwhile, the detailed formation processes were also systematically investigated. By cooling the system from 30℃ down to 0℃, we have in situ observed the dynamic formation and evolution process of the ordered wrinkle structure. According to the mechanics principles, some processes including the initiation and development of the wrinkle, the formation and evolution of the defect as well as the variation of wavelength and amplitude with temperature were studied. The results offer some clues to the formation of large-scaled high ordered wrinkle patterns.

关 键 词：褶皱 动态过程 应力系统 缺陷 

分 类 号：O484.2[理学—固体物理]