Preliminary investigation of the effect of dimple size on friction in line contacts

被引:147
作者
Wang, Xiaolei [1 ]
Liu, Wei [1 ]
Zhou, Fei [1 ]
Zhu, Di [1 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Nanjing 210016, Peoples R China
关键词
Surface texture; Line contact; Friction; Load carrying capacity; BIOLOGICAL SURFACES; LUBRICATION; WATER; PERFORMANCE; TEXTURE;
D O I
10.1016/j.triboint.2009.03.012
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The scale of surface texture is becoming an important issue of surface texture design, particularly for the condition of low speed and high load. Experiments were carried out to investigate the effect of dimple size on friction under line contact condition. The patterns of dimples distributed as square array were fabricated on the surface of brass disks. Each pattern has the same area density of 7%, the same depth over diameter ratio h/d of 0.03, and dimple diameter d varying from 20 to 60 mu m. The frictional tests of the brass disk sliding against a stationary cylindrical surface of bearing roller were conducted. It was found that the pattern with dimple diameter of 20 mu m presented the effect of friction reduction. For the further understanding of the effect of dimple size under line contact condition, numerical simulations were also carried out to evaluate the hydrodynamic pressure within the contact of cylindrical and plane surfaces. The effects of dimple size and radius of the cylinder on the load carrying capacity were evaluated and discussed. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1118 / 1123
页数:6
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