Viscoelastic depinning of driven systems: mean-field plastic scallops
We have investigated the mean-field dynamics of an overdamped viscoelastic medium driven through quenched disorder. The model allows for the coexistence of pinned and sliding regions and can exhibit continuous elastic depinning or first-order hysteretic depinning. Numerical simulations indicate mean-field instabilities that correspond to macroscopic stick-slip events and lead to premature switching. The model describes the elastic and plastic dynamics of driven vortex arrays in superconductors and other extended disordered systems.
Marchetti
MC
Physics Department, Syracuse University, Syracuse, New York 13244, USA.
Middleton
AA
Prellberg
T