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Predicting fatigue life for finite roller contacts based on a mixed EHL model using realistic surface roughness

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Abstract

Surface contact fatigue is a major failure mode of many mechanical components, such as various gear pairs, bearings, cam-follower systems, and so on. The present study aims to develop a fatigue life prediction approach for finite line contact model using machined surface topography. Based on the developed model, the effect of working conditions and lubrication parameters on the lubrication performance and fatigue life are investigated. The obtained results show that, by introducing the realistic roughness, the distribution of pressure, film thickness and stress field is significant fluctuations. Meanwhile, the location of maximum stress tends to move to subsurface. The effect of load on fatigue life is significant. Yet, the speed does not seem to have a great influence on the fatigue life in various load ranges. It is also indicated that the high ambient viscosity is beneficial to the lubrication performance and fatigue life.

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Author information

Authors and Affiliations

  1. Hubei Agricultural Machinery Engineering Research and Design Institute, Hubei University of Technology, Wuhan, 430068, China

    Mingyong Liu & Chenhui Wu

  2. Segula Technologies Greater China Region, Wuhan, 430056, China

    Chunai Yan

Authors
  1. Mingyong Liu
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  2. Chenhui Wu
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  3. Chunai Yan
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Correspondence to Mingyong Liu.

Additional information

Recommended by Associate Editor In-Ha Sung

Mingyong Liu, born in 1985, obtained Ph.D. degree in the Chongqing University, China in 2013. His research fields include gear dynamic and gear tribology. He had published 6 international journal papers and 3 conference papers in international gear conferences.

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Liu, M., Wu, C. & Yan, C. Predicting fatigue life for finite roller contacts based on a mixed EHL model using realistic surface roughness. J Mech Sci Technol 31, 3419–3428 (2017). https://doi.org/10.1007/s12206-017-0630-2

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  • DOI: https://doi.org/10.1007/s12206-017-0630-2

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