To read the full version of this content please select one of the options below:

Numerical and experimental investigation on influence of compound dimple on tribological performances for rough parallel surfaces

Fanming Meng (The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China)
Zhitao Cheng (The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China)
Tiangang Zou (Science and Technology on Vehicle Transmission Laboratory, China North Vehicle Research Institute, Beijing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 10 July 2017

Abstract

Purpose

This study aims to explore the superiority of the compound dimple (e.g. the rectangular-rectangular dimple) and compare its tribological performance for rough parallel surfaces with those of the traditional one-layer dimple (simple dimple).

Design/methodology/approach

A mixed-lubrication model for a rough textured surface is established and solved using the finite difference method for film pressure and contact pressure. To accelerate the evaluation of surface deformation, the efficient Continuous convolution fast Fourier transform algorithm is applied. The effects of the compound dimple on the tribological performance for the rough parallel surfaces is numerically investigated. And these effects are compared with those of the simple dimple. Furthermore, a reciprocating friction test is conducted to verify the superiority of the compound dimple.

Findings

The compound dimple exhibits better tribological performances in comparison with the traditional simple dimple, that is, a larger load-carrying capacity and a smaller friction coefficient. To achieve the best tribological performances for the rough parallel surfaces, the depth ratio of the lower pore to the total pore of the compound dimple and the dimple interval should be reasonably chosen. For the surface with compound dimples, there exists an optimal surface roughness to simultaneously maximize the load-carrying capacity and minimize the friction coefficient. The smaller friction coefficient of the surface with compound dimples is verified by the reciprocating friction test.

Originality/value

The compound dimple is proposed and the superiority of this novel surface texture is confirmed. This study is expected to provide a new texturing method to improve the tribological performances of the traditional simple dimple.

Keywords

Acknowledgements

This study was supported by the Natural Science Foundation of P.R. China (No. 51375509) and the Fundamental Research Funds for the Central Universities of P.R. China (Nos 106112015CDJZR118805, 106112016CDJZR288805 and CDJZR12248801).

Citation

Meng, F., Cheng, Z. and Zou, T. (2017), "Numerical and experimental investigation on influence of compound dimple on tribological performances for rough parallel surfaces", Industrial Lubrication and Tribology, Vol. 69 No. 4, pp. 433-446. https://doi.org/10.1108/ILT-03-2016-0050

Publisher

:

Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited