RUPTURE DYNAMICS OF A PLANAR FAULT IN A 3D ELASTIC MEDIUM: RATE- AND SLIP-WEAKENING FRICTION
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dc.contributor.author | Fukuyama E. | |
dc.contributor.author | Madariaga R. | |
dc.date.accessioned | 2021-01-05T03:40:21Z | |
dc.date.available | 2021-01-05T03:40:21Z | |
dc.date.issued | 1998 | |
dc.identifier | https://elibrary.ru/item.asp?id=31665913 | |
dc.identifier.citation | Bulletin of the Seismological Society of America, 1998, , 1, 1-17 | |
dc.identifier.issn | 0037-1106 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/22244 | |
dc.description.abstract | We propose a new boundary integral equation method (BIEM) to model the spontaneous propagation of rupture on a planar fault embedded in a homogeneous elastic medium. The BIEM formulation is very compact and fast in computation, so that we are able to study the effect of different slip- and rate-dependent friction laws on dynamic shear fault propagation. We simulated a spontaneous rupture by a sudden break of asperity under two friction laws, rate and/or slip weakening. We examined both long and circular asperities. The long asperity model corresponds to the 2D anti-plane or in-plane problem. The obtained result shows that slip-weakening friction is important at the crack tip, and rate-weakening friction plays an important role in the healing stage. If slip-weakening friction is strong stress drops gradually at the crack tip. On the other hand, if rate-weakening friction is strong stress drops abruptly, but it stops suddenly and sometimes stress recovers. This sudden stop of rupture produces a heterogeneous stress distribution, which will in turn produce aftershocks. Finally, we studied a realistic asperity model in which rupture starts from a small patch and then propagates with finite rupture speed. Depending on the asperity size healing can occur even without rate-weakening friction. This is due to very strong healing waves produced by the edges of the asperity. | |
dc.title | RUPTURE DYNAMICS OF A PLANAR FAULT IN A 3D ELASTIC MEDIUM: RATE- AND SLIP-WEAKENING FRICTION | |
dc.type | Статья |
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