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《China Mechanical Engineering》 2016-20
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Research on Fractal Model of TCS between Spherical Surfaces Considering Friction Factors

Liu Peng;Chen Qi;Fan Hao;Huang Shouwu;Hefei University of Technology;  
In order to precisely calculate TCS between spherical surfaces,this paper presented the establishment of fractal model for TCS calculations between spheres considering friction factors.This model was obtained by introducing the equation of critical contact area of elasto-plastic deformation with friction and employing the basic theory of TCS,and based on the fractal contact model of two spherical surfaces.The numerical results show that:the TCS increases with normal loads;the relationship between TCS and friction coefficient is vary as the fractal dimension changes.It is efficient to improve the TCS by adding material propertied parameters and fractal roughness amplitude.The maximum value appears in TCS when the fractal dimension is 1.5and the TCS increases significantly when the fractal dimension is about 1.5.Furthermore,TCS of inner contact is bigger than that of outer contact;TCS increases with curvature radius of cylinders.The theory herein helps to analyze the lubrication and dynamic characteristics between high-pairs joint surfaces(like bearings)in the future.
【Fund】: 国家自然科学基金资助项目(51305116)
【CateGory Index】: TH117.1
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