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.
Keywords
press-fit joint, nonuniform pressure distribution, energy
dissipation, damping ratio
