Design method of surface texture for controlling friction characteristics

Abstract

In this research, we propose a numerical method to design surface texture with the desired friction characteristics, which are arbitrarily given according to the design purpose. The surface texture is parameterized, and the parameters are determined with the response surface method. The surface texture models are made based on the orthogonal array of Design of Experiments, and their friction characteristics between the surface texture model and the finger model are evaluated using the finite element sliding analysis. The three-dimensional multi-layered finger model with fingerprints is constructed based on the friction experiments and the sliding analyses in advance. The objective function and the constraint conditions are defined combining the desired friction characteristics, such as average friction coefficient, minimum friction coefficient, and average friction amplitude. The parameters of the surface texture is determined by the mathematical programming and the response surfaces. Numerical examples show that the proposed method is effective for the design of surface textures.

Keywords

• surface texturing
• finite element
• fingerprint
• multi-layered structure
• design of experiments
• response surface methodology
• friction coefficient