Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (1): 106-110,123.doi: 10.3969/j.issn.1000-565X.2011.01.020

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Effect of Micro-Dimple Shapes on Tribological Properties of Specimen Surfaces

Yu Hai-wu Yuan Si-huan Sun Zao Wang Xiao-lei   

  1. Nanjing university of aeronautics institute of electrical and mechanical, nanjing, jiangsu 210016
  • Received:2010-06-10 Revised:2010-08-02 Online:2011-01-25 Published:2010-12-01
  • Contact: 王晓雷(1963一)，男，教授，博士生导师，主要从事微纳米摩擦学研究 E-mail:xl—wang@nuaa．edu．cn
  • About author:于海武(1982一)，男，博士生，主要从事微纳米摩擦学研究
  • Supported by:

    国家自然科学基金资助项目(50675101)；江苏省普通高校研究生科研创新计划项目(CX10B_O93Z一05)

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Abstract:

In order to study the effects of dimple shape on the tribological behavior of sliding surfaces, the geometric shapes of circular, square and elliptic was selected in this study and investigated by reciprocating frictional experiments. The results indicate that each geometric shape possess a optimum area ratio which can obtain minimum friction coefficient under the condition of fixed dimple area and dimple depth; of all optimum area ratio of each geometric shape, elliptic shows the best result of friction reduction. Compared with the untextured surface, the friction coefficient of elliptic dimple decreased by 26.3% when the test load is 200 N and the rotational speed is 400 r/min. With the load increased, however, the friction reduction weakened significantly, this shows that it is difficult to reduce friction using surface texture under the high test load.

Key words: surface texture, face-contact, micro-dimple shape, friction coefficient