The influence of interfacial wear characteristics on stick-slip vibration.

This study investigates the effects of interfacial wear characteristics on stick-slip vibration under different normal loads. The results reveal that the amplitude and frequency of stick-slip vibration are correlated with changes in the coefficient of friction (COF) and normal force, which are affected by the uneven wear on the friction block surface. Uneven wear causes eccentric wear angles and larger contact plateaus at the leading edge due to a non-uniform contact stress distribution. Specifically, uneven wear affects the difference in the static and kinetic COFs, contact stiffness, and eccentric wear angle of the friction system, thereby influencing the stick-slip vibration characteristics. Increasing the effective contact area can promote a uniform contact stress distribution, optimizing the vibration characteristics of the system. • The stick-slip vibration behavior is affected by the uneven wear of the surface. • Uneven wear results from non-uniform contact stress distribution. • Uneven wear changes the contact status and thus deteriorates vibration response. • Increasing effective contact area can optimize system vibration response. [ABSTRACT FROM AUTHOR]