title: Unjamming dynamics: the micromechanics of a seismic fault model.
abstract: The unjamming transition of granular systems is investigated in a seismic fault model via three dimensional molecular dynamics simulations. A two-time force-force correlation function, and a susceptibility related to the system response to pressure changes, allow us to characterize the stick-slip dynamics, consisting in large slips and microslips leading to creep motion. The correlation function unveils the micromechanical changes occurring both during microslips and slips. The susceptibility encodes the magnitude of the incoming microslip.
authors.affiliation: CNR-SPIN, Department of Physical Sciences, University of Naples Federico II, 80126 Napoli, Italy. picaciamarra@na.infn.it
authors.forename: Massimo
authors.initials: M
authors.lastname: Pica Ciamarra
authors.forename: Eugenio
authors.initials: E
authors.lastname: Lippiello
authors.forename: Cataldo
authors.initials: C
authors.lastname: Godano
authors.forename: Lucilla
authors.initials: L
authors.lastname: de Arcangelis