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Research Article | Open Access

Wear law in mixed lubrication based on stress-promoted thermal activation

Xin PEI1, Wei PU1( ), Jialong YANG1, Ying ZHANG2
School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China
School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China
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Abstract

Although several empirical wear formulas have been proposed, theoretical approaches for predicting surface topography evolution during sliding wear are limited. In this study, we propose a novel wear-prediction method, wherein the energy-based Arrhenius equation is combined with a mixed elastohydrodynamic lubrication (EHL) model to predict the point-contact wear process in mixed lubrication. The surface flash temperature and contact pressure are considered in the wear model. Simulation results are compared with the experimental results to verify the theory. The surface topography evolutions are observed during the wear process. The influences of load and speed on wear are investigated. The simulation results based on the Arrhenius equation relationship shows good agreement with the results of experiments as well as the Archard wear formula. However, the Arrhenius equation is more accurate than the Archard wear theory in some aspects, such as under high-temperature conditions. The results indicate that combining the wear formulas with the mixed EHL simulation models is an effective method to study the wear behavior over time.

Keywords

mixed lubricationsliding wearArchardArrheniussurface topography

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Friction
Volume 9 Issue 4,
August 2021
Pages 710-722
DOI: 10.1007/s40544-020-0365-4
Cite this article:
PEI X, PU W, YANG J, et al. Wear law in mixed lubrication based on stress-promoted thermal activation. Friction, 2021, 9(4): 710-722. https://doi.org/10.1007/s40544-020-0365-4

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Received: 15 October 2019
Revised: 12 December 2019
Accepted: 16 January 2020
Published: 23 July 2020
© The author(s) 2020

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