Beyond uni-directional hierarchical wrinkle formation

本计画旨在了解基材支撑薄膜之阶层式褶皱形成。与前一个项目相比，前一个项目的目标是显示单轴变形导致的一个首选方向的褶皱，将研究更复杂的双轴和时间控制载荷情况。此外，我们要扩大发达国家的掩蔽方法对2D图案化的层次结构。要做到这一点，我们将开发新的实验设置，以控制复杂的双向加载模式结合掩蔽方法。我们将通过详细的有限元模拟来补充实验研究。这些将集中在新的粘弹性材料行为的变分公式和详细的研究皱纹的形成分叉分析。这将允许确定和时间控制，并研究所产生的复杂的2D条纹图案。

This project aims at understanding hierarchical wrinkle formation of substrate-supported thin films. In contrast to the predecessor project, which was aiming at wrinkles that show one preferred direction resulting from uni-axial deformation, more complex bi-axial and temporally controlled load scenarios will be investigated. Further, we want to expand the developed masking approach towards 2D patterned hierarchical wrinkling. To do so we will develop novel experimental setups to control complex bi-directional loading patterns in combination with a masking approach. We will complement the experimental investigations by detailed finite element simulations. These will focus on novel variational formulations of viscoelastic material behavior and on the detailed study of wrinkle formation by bifurcation analysis. This will allow the determination and temporal control, and study of the resulting complex 2D wrinkling patterns.