Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item:

Authors: Bizzarri, A*
Title: An efficient mechanism to avert frictional melts during seismic ruptures
Title of journal: Earth and Planetary Science Letters
Series/Report no.: /296 (2010)
Publisher: Elsevier
Issue Date: 9-Jun-2010
DOI: 10.1016/j.epsl.2010.05.012
Keywords: earthquake dynamics
Abstract: We consider the spatio-temporal evolution of temperature due to frictional heating caused by the spontaneous propagation of 3-D dynamic seismic ruptures on planar faults. In our numerical experiments, which characterize typical crustal earthquakes, we assume that fault friction is controlled by different linear and nonlinear slip-dependent friction laws. In this paper we confirm that a necessary condition to prevent melting is to have a nearly complete breakdown stress drop. Our simulations, which employ a nonlinear slipdependent governing equation recently inferred from laboratory experiments by Sone and Shimamoto (2009), reproduce such a dramatic fault weakening and represent a plausible explanation for the prevention of melting during earthquake ruptures. We also demonstrate that low friction alone, although necessary, is not a sufficient condition to avert melts; the linear (or classical) slip-weakening (SW) law would produce melting, even assuming the same lengthscales and frictional levels. To avoid melting with linear SW law we have to impose a specific value of the SW distance. This reveals the prominent role of the time evolution of traction within the cohesive zone, where the stress release is realized, and of the value of the fracture energy density.
Appears in Collections:04.06.01. Earthquake faults: properties and evolution
Papers Published / Papers in press

Files in This Item:

File SizeFormatVisibility
10051808462709103.pdf1.44 MBAdobe PDFView/Open

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Share this record




Stumble it!



Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA