Mathematics – Logic
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22...25o&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 1, p. 25-28
Mathematics
Logic
16
Ductile-Brittle Transition, Earth Crust, Failure Analysis, Plastic Properties, Rocks, Shear Strength, Stress Intensity Factors, Geological Faults, Pressure Dependence, Stresses, Tectonics, Temperature Dependence
Scientific paper
As a first step to establish the law governing shear failure of typical crustal materials in the brittle-plastic transition regime under lithospheric conditions, and thereby to properly estimate a depth profile of lithospheric strength in quantitative terms, the effects of the normal stress sigma(sub n) across the fault surfaces and ambient temperature T on the shear failure strength of dry Westerly granite in the brittle to brittle-plastic transition regimes are evaluated quantitatively, using experimental data published by earlier authors. The empirical law proposed can predict the shear failure strength at strain rates of 10(exp -4) - 10(exp -5)/s under any (sigma(sub n), T) conditions in the brittle to brittle-plastic transition regimes.
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