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Multiscale analysis of friction behavior at fretting interfaces
Friction ( IF 6.8 ) Pub Date : 2020-03-19 , DOI: 10.1007/s40544-019-0341-z
Zhinan Zhang , Shuaihang Pan , Nian Yin , Bin Shen , Jie Song

Friction behavior at fretting interfaces is of fundamental interest in tribology and is important in material applications. However, friction has contact intervals, which can accurately determine the friction characteristics of a material; however, this has not been thoroughly investigated. Moreover, the fretting process with regard to different interfacial configurations have also not been systematically evaluated. To bridge these research gaps, molecular dynamics (MD) simulations on Al-Al, diamond-diamond, and diamond-silicon fretting interfaces were performed while considering bidirectional forces. This paper also proposes new energy theories, bonding principles, nanoscale friction laws, and wear rate analyses. With these models, semi-quantitative analyses of coefficient of friction (CoF) were made and simulation outcomes were examined. The results show that the differences in the hardness, stiffness modulus, and the material configuration have a considerable influence on the fretting process. This can potentially lead to the force generated during friction contact intervals along with changes in the CoF. The effect of surface separation can be of great significance in predicting the fretting process, selecting the material, and for optimization.



中文翻译:

微动界面摩擦行为的多尺度分析

微动界面处的摩擦行为是摩擦学的基础知识,在材料应用中很重要。但是,摩擦具有接触间隔,可以精确地确定材料的摩擦特性。但是,尚未对此进行彻底调查。而且,关于不同界面形态的微动过程也没有得到系统的评估。为了弥补这些研究空白,在考虑双向力的同时,对Al-Al,金刚石-金刚石和金刚石-硅微动界面进行了分子动力学(MD)模拟。本文还提出了新的能量理论,键合原理,纳米级摩擦定律和磨损率分析。使用这些模型,进行了摩擦系数(CoF)的半定量分析,并检验了仿真结果。结果表明,硬度,刚度模量和材料构型的差异对微动过程有很大影响。这可能会导致在摩擦接触间隔期间产生的力以及CoF的变化。表面分离的效果对于预测微动过程,选择材料和进行优化具有重要意义。

更新日期:2020-04-21
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