To predict the wear extent of spherical joints in alignment mechanism of large aircraft component, a wear model of spherical joint with clearance was proposed. The kinematic model of spherical joint was constructed according to its geometric condition. Continuous contact force model with hysteresis damping coefficient and Coulomb friction law with modification were utilized to develop the dynamic model of spherical joint. The Archard’s equation was employed to model the wear of spherical joint. To acquire the distribution of wear depth, the surface on the ball and socket was discretized for calculating and storing wear depth. Hertz contact theory was used to obtain the distribution of contact force. Process simulation of alignment mechanism with four positioners was carried out. From the result acquired, it shows that the distribution of wear on the surface is not uniform, and the total wear volumes of each spherical joint are not uniform either. This wear model is also able to be applicable for life prediction and mechanical design of alignment mechanism.
YING Zheng, ZHANG Ming, WANG Qing, KE Ying-lin. Modeling and simulation of wear for alignment mechanism of
large aircraft component. J4, 2013, 47(2): 209-215.
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