Temperature Rise in Frictional Sliding Contact of Elastic–Plastic Solids with Fractal Surface

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2024-11-17 DOI:10.1007/s11249-024-01934-5

Si-Cheng Wang, Yue Ding, Yunlai Zhou, Gang-Feng Wang

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Abstract

Surface temperature rise during the sliding process significantly affects friction and wear, which is crucial for the performance of mechanical systems. In this work, the finite element method is adopted to simulate the frictional contact between a two-dimensional cylinder and an elastic–plastic substrate with a self-affine fractal surface. The influences of surface profile and external load on the maximum temperature rise are examined. Either the increase of roughness or the decrease of Hurst index would result in a reduction in contact area, and are more likely to produce higher maximum temperature and surface damage. Additionally, higher sliding velocity increases the maximum temperature, but the uplift of external load tends to eliminate the effects of rough profile on temperature and contact pressure. A general relation between maximum surface temperature rise and contact area for rough surfaces is proposed to predict the occurrence of the high-temperature hotspots during the sliding process. This study provides insights and novel perspectives for the understanding of the frictional and thermodynamic behavior of contact in mechanical structures.

Graphical Abstract

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具有分形表面的弹塑性固体摩擦滑动接触中的温度上升

滑动过程中表面温度的升高会严重影响摩擦和磨损，这对机械系统的性能至关重要。本研究采用有限元法模拟了二维圆柱体与具有自凹凸分形表面的弹塑性基体之间的摩擦接触。研究了表面粗糙度和外部载荷对最大温升的影响。粗糙度的增加或赫斯特指数的减小都会导致接触面积的减小，更有可能产生更高的最高温度和表面损伤。此外，较高的滑动速度也会增加最高温度，但外部载荷的提升往往会消除粗糙度对温度和接触压力的影响。研究提出了粗糙表面的最大表面温升与接触面积之间的一般关系，以预测滑动过程中高温热点的出现。这项研究为理解机械结构中接触的摩擦和热力学行为提供了见解和新的视角。

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.