Abstract
Since the excitement of gecko free-walk on a smooth surface is discovered with the cause of Wan der Waals force, researchers have focused on the development of biomimetic gecko tape. Hierarchical structure and anisotropic adhesion are two of the spotlights. However, little work has been done on integration of these two parameters. This paper presents a model design of orientated micro-and nano-arrays including three levels of setae, branches and spatulae. Finite element method is applied for compression shear test simulation. The anisotropic property is controllable due to the hierarchical surface design.