Quantification of Fault-Zone Plasticity Effects with Spontaneous Rupture Simulations

2017 ◽  
pp. 45-67 ◽  
Author(s):  
D. Roten ◽  
K. B. Olsen ◽  
S. M. Day ◽  
Y. Cui
Keyword(s):  
Fault Zone ◽  
Spontaneous Rupture

Modeling dynamic rupture in a 3D earthquake fault model

1998 ◽  
Vol 88 (5) ◽  
pp. 1182-1197 ◽  
Author(s):  
R. Madariaga ◽  
K. Olsen ◽  
R. Archuleta
Keyword(s):  
Boundary Conditions ◽  
Fault Zone ◽  
Spontaneous Rupture ◽  
Grid Method ◽  
Three Dimensions ◽  
Initial Stresses ◽  
Staggered Grid ◽  
Dynamic Rupture ◽  
Plane Shear ◽  
Frictional Instability

Abstract We propose a fourth-order staggered-grid finite-difference method to study dynamic faulting in three dimensions. The method uses an implementation of the boundary conditions on the fault that allows the use of general friction models including slip weakening and rate dependence. Because the staggered-grid method defines stresses and particle velocities at different grid points, we preserve symmetry by implementing a two-grid-row “thick” fault zone. Slip is computed between points located at the borders of the fault zone, while the two components of shear traction on the fault are forced to be symmetric inside the fault zone. We study the properties of the numerical method comparing our simulations with well-known properties of seismic ruptures in 3D. Among the properties that are well modeled by our method are full elastic-wave interactions, frictional instability, rupture initiation from a finite initial patch, spontaneous rupture growth at subsonic and supersonic speeds, as well as healing by either stopping phases or rate-dependent friction. We use this method for simulating spontaneous rupture propagation along an arbitrarily loaded planar fault starting from a localized asperity on circular and rectangular faults. The shape of the rupture front is close to elliptical and is systematically elongated in the inplane direction of traction drop. This elongation is due to the presence of a strong shear stress peak that moves ahead of the rupture in the in-plane direction. At high initial stresses the rupture front becomes unstable and jumps to super-shear speeds in the direction of in-plane shear. Another interesting effect is the development of relatively narrow rupture fronts due to the presence of rate-weakening friction. The solutions for the “thick fault” boundary conditions scale with the slip-weakening distance (D0) and are stable and reproducible for D0 greater than about 4 in terms of 2Tu/μ × Δx. Finally, a comparison of scalar and vector boundary conditions for the friction shows that slip is dominant along the direction of the prestress, with the largest deviations in slip-rate direction occurring near the rupture front and the edges of the fault.

Quantification of Fault-Zone Plasticity Effects with Spontaneous Rupture Simulations

2017 ◽  
Vol 174 (9) ◽  
pp. 3369-3391 ◽  
Author(s):  
D. Roten ◽  
K. B. Olsen ◽  
S. M. Day ◽  
Y. Cui
Keyword(s):  
Fault Zone ◽  
Spontaneous Rupture

Spontaneous Rupture of a Bladder Diverticulum: A Case Report

2006 ◽  
Vol 54 (4) ◽  
pp. 293
Author(s):  
Hee Sun Park ◽  
Seung Huyp Kim ◽  
Sun Ho Kim ◽  
Sung Il Hwang ◽  
Sung Il Jung
Keyword(s):  
Case Report ◽  
Spontaneous Rupture ◽  
Bladder Diverticulum

Shear strength behavior of Mont Terri Opalinus Claystone in fault zone

2015 ◽  
Vol 10 (1) ◽  
pp. 31-38
Author(s):  
Ildikó Buocz ◽  
Nikoletta Rozgonyi-Boissinot ◽  
Ákos Török
Keyword(s):  
Shear Strength ◽  
Fault Zone ◽  
Strength Behavior ◽  
Mont Terri

Spontaneous rupture of a mechanical valve in a mitral position (On-X) with migration-embolization to aortic bifurcation from the perspective of the vascular surgeon

2020 ◽  
Vol 61 (2) ◽  
Author(s):  
José A. Torres ◽  
Adolfo Arevalo ◽  
José A. Sastre ◽  
José R. González-Porras ◽  
Roberto Salvador ◽  
...  
Keyword(s):  
Spontaneous Rupture ◽  
Mechanical Valve ◽  
Aortic Bifurcation ◽  
Vascular Surgeon ◽  
Mitral Position

Ultra-High-Resolution 3D (UHR3D) Seismic Survey - Application to Hinagu Fault Zone, Yatsushiro Sea, Kyushu, Japan -

2018 ◽  
Vol 71 (0) ◽  
pp. 33-42
Author(s):  
Shigeru Ino ◽  
Shigeyuki Suda ◽  
Hidekuni Kikuchi ◽  
Shiro Ohkawa ◽  
Shintaro Abe ◽  
...  
Keyword(s):  
High Resolution ◽  
Fault Zone ◽  
Seismic Survey ◽  
Yatsushiro Sea
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