Effect of groove surface on friction noise and its mechanism

In this study, friction noise according to whether grooves exist was measured using a reciprocating sliding device, and the relationship between the groove and friction noise mechanism was investigated. Experimental results revealed that both non-groove textured and groove textured surfaces produced friction noise at approximately 5 kHz. However, the friction noise onset time was relatively faster and the sound pressure level was higher for the non groove textured surface. The tribo-surfaces of the plate and ball which change in time for the non-groove textured and groove textured surfaces were observed using a microscope. For the non-groove textured surface, adhesive wear was commonly observed on the tribo-surface, and for the groove textured surface, wear particles accumulated within the groove due to the movement of the ball, and adhesive wear appeared more slowly. As a result, the friction coefficient was relatively larger for the non-groove textured surface, facilitating the mode coupling instability. Using the pin-on-disk system, the propensity for the negative friction-velocity slope was also measured with regard to the non-groove textured surface.