2022 Volume 67 Issue 5 Pages 317-322
Surface texturing is a design technique to generate irregularities on the surface of industrial products for changing touch feeling or friction properties. In this paper, we introduce a parametric shape optimization method for designing a macro-size texture. In this method, the surface texture is parameterized in advance, and the parameters are determined with the response surface method. The surface textures are modelled based on the orthogonal array of Design of Experiments, and the friction or the tactile characteristics between the surface texture model and the finger model are evaluated using the nonlinear finite element contact-sliding analysis. A 3D multi-layered finger model with fingerprints and the mechanoreceptors inside is constructed. The objective function and the constraint conditions are defined combining the desired characteristics such as average friction coefficient, average friction amplitude, or stress of the mechanoreceptors. The parameters of the texture are determined by the mathematical programming and the response surfaces (or surrogate functions). Numerical examples show that the proposed method is effective for the design of macro-size surface textures.
