Physics – Condensed Matter – Materials Science
Scientific paper
2011-11-14
Geophys. Res. Lett., 39, L03308, 2012
Physics
Condensed Matter
Materials Science
6 pages, 4 figures, 1 table
Scientific paper
10.1029/2011GL050554
The failure of frictional interfaces and the spatio-temporal structures that accompany it are central to a wide range of geophysical, physical and engineering systems. Recent geophysical and laboratory observations indicated that interfacial failure can be mediated by slow slip rupture phenomena which are distinct from ordinary, earthquake-like, fast rupture. These discoveries have influenced the way we think about frictional motion, yet the nature and properties of slow rupture are not completely understood. We show that slow rupture is an intrinsic and robust property of simple non-monotonic rate-and-state friction laws. It is associated with a new velocity scale $c_{min}$, intrinsically determined by the friction law, below which steady state rupture cannot propagate. We further show that rupture can occur in a continuum of states, spanning a wide range of velocities from $c_{min}$ to elastic wave-speeds, and predict different properties for slow rupture and common fast rupture. Our results are in qualitative agreement with recent high-resolution laboratory measurements and may provide a theoretical framework for understanding slow rupture phenomena along frictional interfaces.
Bouchbinder Eran
Brener Efim A.
Sinai Yohai Bar
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