The effect of dimple shapes on friction of parallel surfaces

• DOI: 10.1177/1350650111406045
• Publication Date: 2011-08-01T13:39:46Z
• Authors: H Yu; H Deng; W Huang; X Wang
• Keywords: Dimple; Ellipse

In this study, the effect of different dimple shapes on tribological performance surface texture has been investigated. First, a numerical model was developed to study hydrodynamic pressure generation. The selected include circle, square, and ellipse, flow direction lubricant is perpendicular major axis elliptical dimples or sides square dimples. results showed that shape can be optimized for greater Then, reciprocating sliding tests were carried out under oil lubrication face-contact conditions. Tests conducted rotational speeds in range 50–500 r/min test loads 200 400 N. Surface patterns with used, orientations same as those used model, depth area ratio varied fixed indicated better friction reduction compared untextured specimens obtained by selecting suitable each shape. Comparing effect, best performance, second results, circular performed worst. However, load increased, all decreased; moreover, differences between became smaller.