TY - JOUR
T1 - Sustained acoustic emissions following tensile crack propagation in a crystalline rock
AU - Bunger, A.P.
AU - Kear, J.
AU - Dyskin, Arcady
AU - Pasternak, Elena
PY - 2015
Y1 - 2015
N2 - © 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.
AB - © 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.
U2 - 10.1007/s10704-015-0020-7
DO - 10.1007/s10704-015-0020-7
M3 - Article
SN - 0376-9429
VL - 193
SP - 87
EP - 98
JO - International Journal of Fracture
JF - International Journal of Fracture
IS - 1
ER -