Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008geoji.173..309k&link_type=abstract
Geophysical Journal International, Volume 173, Issue 2, pp. 309-314.
Astronomy and Astrophysics
Astronomy
4
Numerical Solutions, Earthquake Dynamics, Dynamics And Mechanics Of Faulting, Fracture And Faults, Mechanics, Theory And Modelling
Scientific paper
We study the effects of structural inhomogeneity on the quasi-static growth of strike-slip faults. A layered medium is considered, made up of an upper layer bounded by a free surface and welded to a lower half-space with different elastic property. Mode III crack is employed as a mathematical model of strike-slip fault, which is nucleated in the lower half-space and then propagates towards the interface. We adopt FEM-β, newly proposed analysis method for failure, to simulate the quasi-statistic crack growth governed by the stress distribution in layered media. Our results show that along planar traces across interfaces a compliant upper layer has significant effects on promoting/suppressing crack growth before/after its extension into the layer and vice versa for a rigid one. This proposes a possibility that surface breaks due to strike-slip faulting could be arrested by deposit layers at the topmost part of the Earth's crust.
Kame Nobuki
Oguni Kenji
Saito Shuji
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