Bio-inspired mechanics of reversible adhesion : Orientation-dependent adhesion strength for non-slipping adhesive contact with transversely isotropic elastic materials

摘要: Geckos and many insects have evolved elastically anisotropic adhesive tissues with hierarchical structures that allow these animals not only to adhere robustly rough surfaces but also detach easily upon movement. In order improve our understanding of the role elastic anisotropy in reversible adhesion, here we extend classical JKR model contact mechanics materials. particular, consider plane strain problem a rigid cylinder non-slipping transversely isotropic half space axis symmetry oriented at an angle inclined surface. The is then subjected arbitrarily pulling force. critical force width pull-off are calculated as function angle. analysis shows leads orientation-dependent adhesion strength which can vary strongly direction pulling. This study may suggest possible mechanisms by devices be designed for engineering applications.