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Modeling Turbulent Hydraulic Fracture Near a Free Surface
(American Society of Mechanical Engineers, 2012)
Motivated by observations of subglacial drainage of water, we consider a hydraulic fracture problem in which the crack fluid flow. Using a hybrid Chebyshev/series-minimization numerical approach, we solve for the pressure ...
Tsunami Wave Analysis and Possibility of Splay Fault Rupture During the 2004 Indian Ocean Earthquake
(Springer, 2012)
The 2004 Indian Ocean tsunami was observed by two satellites, close in space and time, that traversed the Indian ocean two hours after the Sumatra-Andaman earthquake, but which observed different tsunami lead wave morphologies. ...
Finite Element Model of Branched Ruptures Including Off-Fault Plasticity
(Seismological Society of America, 2012)
Fault intersections are a geometric complexity that frequently occurs in nature. Here we focus on earthquake rupture behavior when a continuous, planar main fault has a second fault branching off of it. We use the finite ...
Nucleation of Slip-Weakening Rupture Instability in Landslides by Localized Increase of Pore Pressure
(American Geophysical Union, 2012)
We model landslide initiation as slip surface growth driven by local elevated pore pressure, with particular reference to submarine slides. Assuming an elastic medium and friction that weakens with slip, solutions exist ...
Dynamic Rupture through a Branched Fault Configuration at Yucca Mountain, and Resulting Ground Motions
(Seismological Society of America, 2010)
We seek to characterize the likelihood of multiple fault activation along a branched normal-fault system during earthquake rupture using dynamic finite element analyses. This is motivated by the normal faults in the vicinity ...
Rupture Nucleation on an Interface with a Power-Law relation between Stress and Displacement Discontinuity
(Springer Verlag, 2010)
We consider rupture initiation and instability on a displacement-weakening interface. It is assumed to follow a power-law relation between a component of displacement discontinuity (whether tensile opening in mode I or ...
A Model for Turbulent Hydraulic Fracture and Application to Crack Propogation at Glacier Beds
(American Geophysical Union, 2010)
Glaciological observations of under‐flooding suggest that fluid‐induced hydraulic fracture of an ice sheet from its bed sometimes occurs quickly, possibly driven by turbulently flowing water in a broad sheet flow. Taking ...
Dilatant Strengthening as a Mechanism for Slow Slip Events
(American Geophysical Union, 2010)
The mechanics of slow slip events (SSE) in subduction zones remain unresolved. We suggest that SSE nucleate in areas of unstable friction under drained conditions, but as slip accelerates dilatancy reduces pore pressure ...
Outburst Flooding Under Ice Sheets as Turbulently Driven Hydraulic Fracture
(American Society of Mechanical Engineers, 2010)
Influence of Material Contrast on Fault Branching Behavior
(American Geophysical Union, 2011)
Material contrasts across faults are a common occurrence, and it is important to understand if these material contrasts can influence the path of rupture propagation. Here we examine models, solved numerically, of rupture ...