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考虑摩擦系数和微凸体相互作用的粗糙表面接触热导分形模型
引用本文:孙献光,孟春晓,段田堂.考虑摩擦系数和微凸体相互作用的粗糙表面接触热导分形模型[J].摩擦学学报,2020,40(5):626-633.
作者姓名:孙献光  孟春晓  段田堂
作者单位:School of Mechanical Engineering and Automation, Northeastern University, Liaoning Shenyang 110819, China
摘    要:基于三维分形理论,建立了考虑摩擦系数和微凸体相互作用的粗糙表面接触热导分形模型,并且考虑了微凸体的弹性变形、弹塑性变形和完全塑性变形. 通过该模型,分析了摩擦系数、分形维数、分形粗糙度和接触载荷对热接触热导的影响. 研究结果表明:接触热导随着摩擦系数和分形粗糙度的增大而减小,随着分形维数和接触载荷的增大而增大. 该研究为开展接合面的热传递提供了一定的理论基础. 

关 键 词:接触热导    粗糙表面    摩擦系数    微凸体相互作用    分形理论

A Fractal Model of Thermal Contact Conductance of Rough Surfaces Considering Friction Coefficient and Asperity Interaction
Institution:School of Mechanical Engineering and Automation, Northeastern University, Liaoning Shenyang 110819, China
Abstract:A fractal model of thermal contact conductance of rough surfaces considering friction coefficient and asperity interaction was established based on the three-dimensional fractal theory, and the elastic deformation, elastic-plastic deformation and full plastic deformation of the asperity were considered. The effects of friction coefficient, fractal dimension, fractal roughness and contact load on thermal contact conductance were analyzed using the proposed model. The results indicated that the thermal contact conductance decreased with the increase of friction coefficient and fractal roughness, and increased with the increase of fractal dimension and contact load. This study provided some theoretical basis for heat transfer between contact surfaces. 
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