Abstract In this paper we investigated the mechanics of topography-driven delamination of a thin elastic patch attached to a wrinkling surface of film-substrate system through both theoretical modelling and finite element simulation. The process of topography-driven delamination could be divided into three stages: wrinkling before delamination occurrence, initiation of delamination and evolution of delamination blister. The topography-driven delamination was found to be dominantly induced by interfacial shear traction and initiate at the location in the middle of peak and valley. The analytical expressions of critical strain and the corresponding critical wrinkling amplitude for topography-driven delamination were derived explicitly and rigorously based on a patch-film-substrate trilayer model. The dependence of the size of delamination blister on the compressive strain was obtained as well using an energy minimization method. The theoretical model was compared with finite element simulation results for validation and a close agreement was observed. At last the theoretical prediction was applied to guide the design of flexible electronics on wrinkling human skin and the design of a new class of active anti-biofouling coating through wrinkling surface texture.

中文翻译：

---

粘附在起皱表面的薄贴片的地形驱动分层

摘要 在本文中，我们通过理论建模和有限元模拟研究了附着在薄膜基材系统起皱表面上的薄弹性贴片的地形驱动分层的力学原理。地形驱动的分层过程可分为分层发生前的起皱、分层的开始和分层气泡的演变三个阶段。发现地形驱动的分层主要由界面剪切牵引引起，并在峰谷中间位置开始。基于贴片-薄膜-基材三层模型，明确而严格地推导出了地形驱动分层的临界应变和相应的临界起皱幅度的解析表达式。还使用能量最小化方法获得了分层气泡尺寸对压缩应变的依赖性。将理论模型与有限元模拟结果进行比较以进行验证，观察到非常一致。最后将理论预测应用于指导起皱人体皮肤柔性电子器件的设计以及通过起皱表面纹理设计新型活性抗生物污垢涂层。