Sustained acoustic emissions following tensile crack propagation in a crystalline rock

A.P. Bunger, J. Kear, Arcady Dyskin, Elena Pasternak

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

© 2015, Springer Science+Business Media Dordrecht. We show that simple breakage of a crystalline rock (gabbro) in tension begets further breakage of rock in the area around the first crack that is self-sustaining and spontaneous and that is detected via sustained acoustic emissions (AE). The result is a sequence of AE events that is statistically similar to aftershocks from earthquakes, that scales with the size of the main crack, and that we were able to observe for days following the initial breakage in laboratory-scale experiments. A new model for aftershock generation that is based on residual strain relaxation is shown to be consistent with the observed hyperbolic decay of the event rate with time and with the manner in which the decay law scales with the size of the main rupture.
Original languageEnglish
Pages (from-to)87-98
JournalInternational Journal of Fracture
Volume193
Issue number1
DOIs
Publication statusPublished - 2015

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