Role of friction-induced torque in stick-slip motion
Résumé
We present a minimal quasistatic 1D model describing the kinematics of the transition from static friction to stick-slip motion of a linear elastic block on a rigid plane. We show that, in the most generic conditions, the kinematics of both the precursors to frictional sliding and the periodic stick-slip motion are controlled by the amount of friction-induced torque at the interface. Our results allow to explain a series of recent experimental observations, in particular the nucleation location of micro-slip instabilities and the build up of an asymmetric interfacial pressure field.
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