LI Zhi, CHEN Jian, SHEN Jin-long, LIU Xiao-jun. Effects of Surface Topography on Friction Noise Under Elastohydrodynamic Lubrication Condition[J]. Applied Mathematics and Mechanics, 2017, 38(7): 807-817. doi: 10.21656/1000-0887.370231
Citation: LI Zhi, CHEN Jian, SHEN Jin-long, LIU Xiao-jun. Effects of Surface Topography on Friction Noise Under Elastohydrodynamic Lubrication Condition[J]. Applied Mathematics and Mechanics, 2017, 38(7): 807-817. doi: 10.21656/1000-0887.370231

Effects of Surface Topography on Friction Noise Under Elastohydrodynamic Lubrication Condition

doi: 10.21656/1000-0887.370231
Funds:  The National Natural Science Foundation of China(51375132)
  • Received Date: 2016-07-22
  • Rev Recd Date: 2016-10-08
  • Publish Date: 2017-07-15
  • The effects of surface topography on the friction noise were studied under the elastohydrodynamic lubrication (EHL) condition. 2 kinds of groove-textured surface topographies were fabricated by laser texturing on the surface of the metal disc specimen. Friction noises and friction characteristics of different surface topographies were tested on a modified JPM-1 2-disc tribo-tester. The effects of different operating conditions and surface topographies on the friction noise under line contact EHL conditions were analyzed, and the results were verified with the finite element analysis. The work shows that, variations of the load and the rotational speed have significant effects on the line contact friction noise. Since the line contact pairs usually work in a partial EHL condition, the friction noise characteristics are similar to those of dry friction: the surface with a larger friction coefficient will radiate stronger friction noise. Specific topographies can improve the lubrication characteristics of the surface, and effectively reduce the sound pressure level of the friction noise. The presence of groove textures can interrupt the stress distribution of the contact area and weaken the impact by surface asperities, thereby reducing the self-excited vibration. At the same time, the proper surface topography structure is also helpful in the formation of lubricating oil film, hence lowering the friction noise as well as the friction energy of the system.
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