柔性衬底/刚性薄膜应力褶皱有序结构形成的动态过程
摘要
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°C down to 0°C, we have <italic>in situ</italic> 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.