Dependence of friction noise of rough surfaces with contact area

Alain Le Bot (1) , Viet Hung Dang (1) , Elie Bou Chakra

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

The noise emitted during the friction of rough surfaces is a wide band noise generated by the numerous impacts occuring between antagonist asperites of surfaces. This study presents an experiment which investigates the law between the acoustical power and a varying number of identical sliders i.e. the nominal contact area. It is found that in some cases, the acoustical power is proportional to the number of sliders while the sound is constant in some others. This result is explained by introducing a dissipation law of vibration at the interface of solids. In the regime where this dissipation process dominates, the sound is constant while in the regime where it is negligible compared with other disspation processes, the sound is proportional to the number of sliders.

Domaines: Acoustique [physics.class-ph]

Alain Le Bot, Viet Hung Dang, Elie Bou Chakra. Dependence of friction noise of rough surfaces with contact area. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811027⟩