CALCULATING FRICTION FORCE BY THE VARIATION OF POTENTIAL ON THE CONTACT SURFACES DURING SLIDING

摘要

In the present paper, a method based on energy dissipation mechanism of the Independent Oscillator Model is used to calculate friction force and friction coefficient of two flat surfaces with a relative motion. The method is simplified to calculate friction work by the potential change of contact surfaces during sliding, which can be gained by a universal adhesive energy function. The results reveal the relationships between friction force and parameters of a tribo-system such as surface energy and microstructure of interfacial material. The numerical solutions of the known experimental data agree with that of Bowden's equation, and they agree with Lantz's experimental results carried out with an ultra high vacuum atomic-force microscope as well. It shows the method is practical.