Physics
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3506310n&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 6, CiteID L06310
Physics
4
Tectonophysics: Rheology And Friction Of Fault Zones (8034), Tectonophysics: Dynamics And Mechanics Of Faulting (8004), Physical Properties Of Rocks: Acoustic Properties, Physical Properties Of Rocks: Wave Attenuation
Scientific paper
We monitored acoustic transmissivity of a frictional interface during laboratory experiments where complex slip history was imposed. Frictional strength, which was also tracked continuously, showed complex changes due to various causes such as aging of the interface in quasi-stationary contact and slip weakening that began with miniscule pre-failure slip. Albeit such complexity, acoustic transmissivity was found to be a unique function of frictional strength throughout the experiment. This suggests that acoustic transmissivity reflects the resultant changes in load-supporting contact population that governs the frictional strength of the moment, not the external conditions that have altered contact state. This simple non-destructive acoustic measurement, which can be applied remotely and continuously, is therefore a robust technique to monitor frictional strength.
Nagata Kohei
Nakatani Masao
Yoshida Shingo
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