Abstract: Designed to the damping problem of asperity contact on double rough surface, The model of elasticity, elastic-plastic and plastic asperity side contact energy dissipation are proposed. The model built on an assumption that asperities are spherical. Through the contact force analysis, two side contact asperities contact force can be divided into a normal component force and a tangential component force. The Hertz and ETSION theory is utilized to set up the relationship between the normal component force and deformation during normal loading-unloading, which undergo three phases of elasticity, elastic-plastic and plastic. The relation between tangential component force and displacement is established in three phases of elasticity, elastic-plastic and plastic, based on the CATTANEO-MINDLIN stick-slip model, BKE model and ERITEN model respectively. Finally, the side contact energy dissipation of asperities undergoes three phases can be get used by the relation between the normal component force and deformation and the relationship between the tangential component force and displacement. The research indicated that the energy dissipation of asperities include strain energy dissipation and friction energy dissipation. Bigger normal deformation results in a higher strain energy dissipation and friction energy dissipation. Greater contact angle has greater strain energy dissipation, but has smaller friction energy dissipation.

Key words: elastic-plastic, friction energy dissipation, loading-unloading, normal, stick-slip, strain energy dissipation, tangential