Subloading-overstress friction model

Abstract

The subloading-friction model proposed formerly is capable of describing the transition from the static to the kinetic friction and the recovery of static friction, which leads to the negative rate-sensitivity, i.e. the decrease of friction resistance with the increase of sliding velocity. The generalized friction model, called the subloading-overstress friction model, is proposed by extending the subloading-friction model so as to describe not only the negative rate-sensitivity but also the positive rate-sensitivity, i.e. the increase of friction resistance with the increase of sliding velocity in this article. The numerical experiments for several levels of material parameters are shown in order to clarify the influences and the physical meanings of the material parameters in the generalized model. Further, the validity is verified by comparisons with test data obtained by executing the friction test using lubricated steels.