Study Of The Friction And Adhesion Mechanism Of Animal Foot-Pad Surface Morphology

Friction plays an important role in our production and life. Many animals have natural tribological survival adaptability in nature, the bionic tribology has shown good development and application prospects in modern society. This paper studies on the animals that has good climbing and adhesion properties in the biologicalworld, and puts forward the best surface structures that have some excellent adhesion and friction properties for the preliminary theoretical exploration work to manufacture the friction-increasing surface of equipments with the bionic technology in order to improve their ability of transferring power and preventing slipping in the next, so it has important theoretical significance and practical application value.In the process of studying biomimetic tribological theory, it is concluded that biomimetic tribological theory is based on the biological surface knowledge. Function is decided structure. The surface structure form, dynamic change and the action manner with environmentl determine the tribological behavior on biological surface, so that only exploring and getting their tribological properties can realize bionic tribological technology development. We observed several different biological foot-pad surface structures with scanning electron microscope and super depth 3D digital microscope, and classified the nonsmooth form of foot-pad surface from different angles, then established nonsmooth evaluation index sets of convex, dent, waviness and seta.Based on animal foot-pad morphology observation and classification, the adhesion and friction mechanism are analyzed in detail from the angle of mechanics and surface morphology structure. From microscopic contact mechanics, capillary action, friction and surface roughness, it is discovered that the foot-pad's adhesion and friction is the consequence of the interaction between them. This paper expounded the different effects of shapes and structures on foot-pad's adhesion and friction, revealed the surface morphology structures play a main role, simplified and modified the foot-pad surface topography structure with the bionics theory, established three different forms such as globular convex, crew-cut columnar convex and dent shape, and made their mathematics model.