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Research on Fractal Friction Model between Balls and Arc Raceways inside a Ball Joint
Technical Paper
2020-01-1093
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
During the operation of the ball joint, its service life and transmission efficiency are affected by the internal friction. Taking the ball joint as the research object, based on fractal theory, the friction between the steel ball and the raceway inside the ball joint of an automotive drive shaft system is studied in this paper. During the analysis, the friction between the steel ball and the arc raceway is regarded as the friction between a sphere and an arc raceway surface. In order to describe the friction state more accurately, this paper proposes a correction coefficient to modify the distribution function of contact asperities in the plane, and obtains the distribution function of contact asperities between the sphere and the arc raceway surface. The correction coefficient is related to the load, the size parameters and the material parameters of the steel ball and the raceway. Then based on the modified distribution function, the fractal models of the friction coefficient, the tangential force (the friction force) and the normal contact load between the steel ball and the raceway are established. Finally, the correction coefficient is verified by the finite element model, while the relationship between the correction coefficient and the load, the relationship between the friction force and the normal contact load, and the relationship between friction coefficient and fractal parameters are analyzed through numerical examples.
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Citation
Feng, H. and Li, X., "Research on Fractal Friction Model between Balls and Arc Raceways inside a Ball Joint," SAE Technical Paper 2020-01-1093, 2020, https://doi.org/10.4271/2020-01-1093.Data Sets - Support Documents
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