• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2024, Vol. 60 ›› Issue (23): 164-176.doi: 10.3901/JME.2024.23.164

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Crack Initiation and Evolution Model for Rolling Bearings Considering Elastohydrodynamic Lubrication

HE Zhiyuan1, CHEN Guo1, CHEN Jiayun1, LIU Yaobin1, SHENG Jiajiu2, WEI Xunkai3   

  1. 1. College of General Aviation and Flight, Nanjing University of Aeronautics and Astronautic, Liyang 213300;
    2. College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106;
    3. Beijing Aeronautical Technology Research Center, Beijing 100076
  • Received:2023-12-06 Revised:2024-05-12 Online:2024-12-05 Published:2025-01-23

Abstract: The final failure form of rolling bearing with sufficient lubrication and fine assembly is the sub-surface crack mainly caused by rolling contact fatigue until the surface spall. In order to better reveal the initiation and evolution mechanism of bearing subsurface fatigue crack, based on the continuous damage mechanics theory and finite element analysis, an efficient model of bearing subsurface crack initiation and evolution considering elastohydrodynamic lubrication (EHL) is established. The damage evolution results of bearing contact fatigue are compared under considering Hertz contact pressure and EHL pressure, respectively. The effects of different loads and random surface roughness on bearing damage evolution and life are also discussed. The influence of material properties on bearing damage evolution is analyzed on the basis of linear elasticity. The result shows that the spall shape of the proposed simulation is consistent with the existing test result, and the research reveals the physical mechanism of bearing crack initiation to damage formation, which can be used as an effective tool to simulate the damage evolution of bearings.

Key words: rolling contact fatigue, elastohydrodynamic lubrication (EHL), damage mechanics, damage evolution, rolling bearing

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