Inverted stick–slip friction: What is the mechanism?

Abstract
A mechanism is proposed for an observed inverted stick–slip motion and a relationship between the macroscopic mechanical response and the dynamics of the embedded system in this regime is established. It is shown that the requirement for the occurrence of inverted stick–slip is the existence of two sliding regimes in the system. The inverted stick–slip stems from a bifurcation from one sliding regime to another. The mechanism suggests that the inverted stick–slip behavior reflects a transition of the embedded system from nonslip to slip boundary conditions.