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Wear law in mixed lubrication based on stress-promoted thermal activation
Friction ( IF 6.3 ) Pub Date : 2020-07-23 , DOI: 10.1007/s40544-020-0365-4
Xin Pei , Wei Pu , Jialong Yang , Ying Zhang

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.



中文翻译:

基于应力促进的热活化的混合润滑中的磨损定律

尽管已提出了几种经验磨损公式,但预测滑动磨损过程中表面形貌演变的理论方法仍然有限。在这项研究中,我们提出了一种新的磨损预测方法,其中基于能量的Arrhenius方程与混合弹性流体动力润滑(EHL)模型相结合,以预测混合润滑中的点接触磨损过程。在磨损模型中考虑了表面毛刺温度和接触压力。将仿真结果与实验结果进行比较,以验证该理论。在磨损过程中观察到了表面形貌的演变。研究了负载和速度对磨损的影响。基于Arrhenius方程关系的仿真结果与实验结果以及Archard磨损公式显示出良好的一致性。但是,在某些方面(例如在高温条件下),Arrhenius方程比Archard磨损理论更准确。结果表明,将磨损公式与混合EHL仿真模型相结合是研究随时间变化的磨损行为的有效方法。

更新日期:2020-07-23
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