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Description of the transitional process from a static to a dynamic frictionalregime is a fundamental problem of modern physics. Previously we developed amodel based on the well-known Frenkel-Kontorova model to describe drymacroscopic friction. Here this model has been modified to include the effectof dissipation in derived relations between the kinematic and dynamicparameters of a transition process. The main (somewhat counterintuitive) resultis a demonstration that the rupture (i.e. detachment front) velocity of theslip pulse which arises during the transition does not depend on friction. Theonly parameter (besides the elastic and plastic properties of the medium)controlling the rupture velocity is the shear to normal stress ratio. Incontrast to the rupture velocity, the slip velocity does depend on friction.The model we have developed describes these processes over a wide range ofrupture and slip velocities (up to 7 orders of magnitude) allowing, inparticular, the consideration of seismic events ranging from regularearthquakes, with rupture velocities on the order of a few km/s, to slow slipevents, with rupture velocities of a few km/day.

How does dissipation affect the transition from static to dynamic macroscopic friction?