吉林大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (增刊1): 86-90.

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Friction coefficient in rough soft contact lubrication

ZHANG Kuo1, TAN Qing-chang1, WANG Shun1, WANG Cong-hui1, Bian Li-juan2   

  1. 1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China;
    2. Driverline R&D Center, Guangxi Liugong Machinery Co., Ltd., Liuzhou 545000, China
  • Received:2012-02-03 Online:2012-09-01 Published:2012-09-01

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Abstract: A soft contact mathematic model of a rigid ball on PDMS disc under lubricated condition was established,and the processed measuring results of surface roughness were coupled into this model. According to the characteristics of different lubrication regions, a friction model for the nominal contact region was established. The effectiveness of the model was verified by present experiments,and the influence of surface roughness on soft contact under different lubricated conditions was analyzed. It was found that the friction coefficient increases at a lower value of μη (the product of entrainment velocity multiplies viscosity) as a consequence of overpressure generated by the interaction between lubricant flow and contacting asperities.

Key words: hydromechanics, soft contact, mathematic model, surface roughness, friction coefficient

CLC Number: 

  • TH117.2
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