Vol. 15, No. 3, 2020

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Slip damping of a press-fit joint under nonuniform pressure distribution along the interface

Huifang Xiao, Yunyun Sun and Jinwu Xu

Vol. 15 (2020), No. 3, 307–323

The energy dissipation and the damping capacity of a press-fit joint under a vertical load are investigated using the continuum elastic beam model. The clamping pressure is considered to be of power law with distance along the contact interface and the corresponding relative displacements under vertical load are derived. Expression of the minimum critical vertical load inducing relative slip along the contact interface is determined. The hysteresis curves of the vertical forces as a function of the relative displacement at the contact interface are obtained for different pressure distribution laws and the associated energy dissipations are presented. The damping ratio of the assembled structure is further evaluated. It is shown that peak values of damping ratio exist for different pressure distribution laws and the normal load at which the peak damping ratio occurs is a function of the pressure distribution law. Three-dimensional finite element analysis validation is performed, which shows good agreement with model predictions.

press-fit joint, nonuniform pressure distribution, energy dissipation, damping ratio
Received: 10 September 2018
Revised: 26 March 2019
Accepted: 26 February 2020
Published: 12 July 2020
Huifang Xiao
University of Science and Technology Beijing
Beijing, 100083
Yunyun Sun
University of Science and Technology Beijing
Beijing, China
Jinwu Xu
University of Science and Technology Beijing
Beijing, 100083