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Autor:
Jasperson, Hope, Bolton, David C., Johnson, Paul, Guyer, Robert, Marone, Chris, de Hoop, Maarten V.
Rocks under stress deform by creep mechanisms that include formation and slip on small-scale internal cracks. Intragranular cracks and slip along grain contacts release energy as elastic waves termed acoustic emissions (AE). AEs are thought to contai
Externí odkaz:
http://arxiv.org/abs/1912.06087
Plate motion near the fault gouge layer, and the elastic interplay between the gouge layer and the plate under stick-slip conditions, is key to understanding the dynamics of sheared granular fault systems. Here, a two-dimensional implementation of th
Externí odkaz:
http://arxiv.org/abs/1911.06051
Publikováno v:
Phys. Rev. Lett. 123, 048003 (2019)
A numerical scheme using the combined finite-discrete element methods (FDEM) is employed to study a model of an earthquake system comprising a granular layer embedded in a formation. When the formation is driven so as to shear the granular layer, a s
Externí odkaz:
http://arxiv.org/abs/1902.08150
Numerical simulation of nonlinear elastic wave propagation in solids with cracks is indispensable for decoding the complicated mechanisms associated with the nonlinear ultrasonic techniques in Non-Destructive Testing (NDT). Here, we introduce a two-d
Externí odkaz:
http://arxiv.org/abs/1811.02955
Autor:
Gao, Ke, Euser, Bryan J., Rougier, Esteban, Guyer, Robert A., Lei, Zhou, Knight, Earl E., Carmeliet, Jan, Johnson, Paul A.
Sheared granular layers undergoing stick slip behavior are broadly employed to study the physics and dynamics of earthquakes. Here, a two dimensional implementation of the combined finite discrete element method (FDEM), which merges the finite elemen
Externí odkaz:
http://arxiv.org/abs/1804.01459
Autor:
Rouet-Leduc, Bertrand, Hulbert, Claudia, Bolton, David C., Ren, Christopher X., Riviere, Jacques, Marone, Chris, Guyer, Robert A., Johnson, Paul A.
Nearly all aspects of earthquake rupture are controlled by the friction along the fault that progressively increases with tectonic forcing, but in general cannot be directly measured. We show that fault friction can be determined at any time, from th
Externí odkaz:
http://arxiv.org/abs/1710.04172
Publikováno v:
Phys. Rev. E 96, 062901 (2017)
A granular system composed of frictional glass beads is simulated using the Discrete Element Method. The inter-grain forces are based on the Hertz contact law in the normal direction with frictional tangential force. The damping due to collision is a
Externí odkaz:
http://arxiv.org/abs/1706.05898
Autor:
Ferdowsi, Behrooz, Griffa, Michele, Guyer, Robert A., Johnson, Paul A., Marone, Chris, Carmeliet, Jan
A fundamental mystery in earthquake physics is ``how can an earthquake be triggered by distant seismic sources?'' Here, we use discrete element method simulations of a granular layer, during stick-slip, that is subject to transient vibrational excita
Externí odkaz:
http://arxiv.org/abs/1507.04710