Frictional dynamics of viscoelastic solids driven on a rough surface

Francois P. Landes 1, 2 Alberto Rosso 2 E. A. Jagla 3

Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2015, 92, pp.012407

We study the effect of viscoelastic dynamics on the frictional properties of a (mean field) spring-block system pulled on a rough surface by an external drive. When the drive moves at constant velocity V, two dynamical regimes are observed: at fast driving, above a critical threshold Vc, the system slides at the drive velocity and displays a friction force with velocity weakening. Below Vc the steady sliding becomes unstable and a stick-slip regime sets in. In the slide-hold-slide driving protocol, a peak of the friction force appears after the hold time and its amplitude increases with the hold duration. These observations are consistent with the frictional force encoded phenomenologically in the rate-and-state equations. Our model gives a microscopical basis for such macroscopic description.

  • 1. The Abdus Salam International Centre for Theoretical Physics
  • 2. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 3. Centro Atómico Bariloche and Instituto Balseiro