A method for determination of kinetic friction coefficient under dynamic loading conditions

Abstract

In general, the kinetic friction coefficient can, under any contact loading condition, be determined using methods completely different from the existing methods based on the measurements of contact load and friction force. The proposed method refers to the determination of kinetic friction coefficient using the dynamic equation of motion for a rotating body, where the active force acts on the rotating body only at the initial moment of motion, while body masses, which are concentrically and eccentrically distributed in relation to the axis of rotation, provide a static and dynamic component of a desired 'sleevebearing' contact load. If the body angle of rotation change is experimentally determined as a function of time, then, based on the dynamic equation of motion, it is possible to determine the current friction coefficient values for the entire time period from the start of the motion to the rotation stop. It can be said that acceleration is a physical and energy indicator for friction and energy dissipation in tribomechanical systems, and that it defines the complete dynamics of the friction process itself.