Effect of Geometry Parameters and Patterns on Tribological Properties of Textured Surface with Elliptical Dimples

The simulation model of textured surface with elliptical dimples was performed in this paper, and tribological properties of parallel reciprocating sliding surfaces under hydrodynamic lubrication conditions were studied in detail. The effects of semi-major axis, ellipticity, inclination angle and offset ratio on coefficient of friction and load-carrying capacity were analyzed, and then the results of three different patterns were compared. The results show that the coefficient of friction reduced as the area ratio and inclination angle increased, but slightly increased with the offset ratio. The load carrying capacity increased significantly with inclination angle and offset ratio. The patterns of elliptical dimples had a limited influence on the coefficient of friction, but a pronounced effect on load-carrying capacity. It is concluded that optimizing geometrical parameters and patterns of elliptical dimples were effective to improve the loadcarrying capacity of textured surfaces.