Journal Article

FZJ-2019-00454

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Unstable Slip Pulses and Earthquake Nucleation as a Nonequilibrium First-Order Phase Transition

Brener, E. A. (Corresponding author)FZJ* ; Aldam, M. ; Barras, F. ; Molinari, J.-F. ; Bouchbinder, E.

2018
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/21264  doi:10.1103/PhysRevLett.121.234302

Abstract: The onset of rapid slip along initially quiescent frictional interfaces, the process of “earthquake nucleation,” and dissipative spatiotemporal slippage dynamics play important roles in a broad range of physical systems. Here we first show that interfaces described by generic friction laws feature stress-dependent steady-state slip pulse solutions, which are unstable in the quasi-1D approximation of thin elastic bodies. We propose that such unstable slip pulses of linear size L∗ and characteristic amplitude are “critical nuclei” for rapid slip in a nonequilibrium analogy to equilibrium first-order phase transitions and quantitatively support this idea by dynamical calculations. We then perform 2D numerical calculations that indicate that the nucleation length L∗ exists also in 2D and that the existence of a fracture mechanics Griffith-like length LG<L∗ gives rise to a richer phase diagram that features also sustained slip pulses.

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Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)

Appears in the scientific report 2018

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Database coverage:
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