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 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.

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References in corpus (5)

• Jamming at Zero Temperature and Zero Applied Stress: the Epitome of Disorder
• Critical scaling in linear response of frictionless granular packings near jamming
• Suppression of friction by mechanical vibrations
• Jamming at zero temperature, zero friction, and finite applied shear stress
• Broad distribution of stick-slip events in Slowly Sheared Granular Media: Table-top production of a Gutenberg-Richter-like distribution

Cited by in corpus (13)

• On the critical nature of plastic flow: one and two dimensional models
• Dynamic weakening by acoustic fluidization during stick-slip motion
• Induced and endogenous acoustic oscillations in granular faults
• Force Percolation Transition of Jammed Granular Systems
• Solid-on-solid single block dynamics under mechanical vibration
• Noise Amplification in Frictional Systems: Oscillatory Instabilities
• Intruder in a two-dimensional granular system: statics and dynamics of force networks in an experimental system experiencing stick-slip dynamics
• Non-monotonic dependence of the friction coefficient on heterogeneous stiffness
• Synchronized oscillations and acoustic fluidization in confined granular materials
• Correlating the force network evolution and dynamics in slider experiments
• Stochastic methods for slip prediction in a sheared granular system
• Experimental measurements of the granular density of modes via impact
• Betweenness centrality illuminates intermittent frictional dynamics