Premium
Asymmetric off‐fault damage generated by bilateral ruptures along a bimaterial interface
Author(s) -
Duan Benchun
Publication year - 2008
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl034797
Subject(s) - slip (aerodynamics) , fault (geology) , coulomb , geology , mechanics , materials science , seismology , physics , electron , thermodynamics , quantum mechanics
We perform numerical simulations of spontaneous dynamic rupture governed by a slip‐weakening law along a bimaterial interface (fault) with off‐fault damage in the form of Coulomb plastic yielding. Off‐fault plastic yielding stabilizes the wrinkle‐like slip pulse in terms of a decreasing rate of slip velocity growth. With a variety of model parameters, ruptures on the fault are bilateral, while off‐fault plastic strain distribution between the two rupture directions is highly asymmetric.