9/22/2023 0 Comments Snake force indicator![]() ![]() 1A,C), which are covered with very specific caudally-oriented kind of nanostructure, so called microdermatoglifics ( Fig. Additionally, the ventral surface of the snake is also not smooth, but consists of caudally-oriented scales ( Fig. Thus, in the case of the snake, the specific roughness of the substrate, on which the snake moves, must play a very important role in generation of frictional forces. Generally, frictional properties of two materials in contact depend on various factors, such as surface energy and material properties of both surfaces, but one of the most important parameters is the surface roughness of both bodies in contact 3, 4. In fact, in order to facilitate locomotion, the surface of the snake skin has to generate low friction, supporting sliding in the forward direction and simultaneously produce high friction, enabling propulsive force generation along the substrate 1, 2. The locomotion without extremities has important tribological consequences in snakes, because their ventral body surface is almost in continuous contact with the substrate. In other words, scale of the skin relief should reflect an adaptation to the particular range of surfaces asperities of the substrate. The model shows that frictional anisotropy appears on the snake skin only on the substrates with a characteristic range of roughness, which is less or comparable with dimensions of the skin microstructure. In order to understand the interactions between the nanostructure arrays of the ventral surface of the snake skin, this study was undertaken, which is aimed at numerical modeling of frictional properties of the structurally anisotropic surfaces in contact with various size of asperities. This might be due to the variety of species studied, diversity of approaches used for the friction characterization, and/or due to the variety of substrates used as a counterpart in the experiments. However, it is known that frictional properties of the ventral surface of the snake skin range in a very broad range and the degree of anisotropy ranges as well to a quite strong extent. ![]() Previous experimental data clearly revealed anisotropic friction on the ventral scale surface of snakes.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |