Abstract:

In order to forecast and control the friction process, the thermal vibration of interfacial atoms stimulated by the interfacial potential energy field is analyzed, and a calculating model of sliding friction coefficient is established based on the thermal dynamic coupling process. Calculated results indicate that the sliding friction coefficient increases with the relative sliding velocity but has nothing to do with the real contact area of friction surface when the area linearly varies with the load. However, when the real contact area is close to the nominal one, the sliding friction coefficient decreases with the increase of the load, It is also found that, with the increase of crystal lattice constant and the decrease of atomic mass, the sliding friction coefficient decreases.

Key words: interfacial atom, thermal dynamic coupling, sliding friction coefficient, energy dissipation, heat vibration