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- W2334256980 abstract "The transition from stable to unstable fracture propagation occurs when fractures begin to interact and link. Thus, fracture network coalescence controls how rocks and engineered structures fail. To constrain the factors that influence localization in shear zones under brittle conditions, we build discrete element method models with a rough fault embedded in a shear zone. We add varying numbers of diffuse, randomly-placed weaknesses to examine the influence of diffuse damage on fracture network localization. The number of weaknesses controls the localization behavior of the fault network and the final fault geometry. We quantify localization using the Gini coefficient of the fracture volume, which measures the nonuniformity in a population. Each model generally increases in localization toward failure. However, models with more diffuse damage experience delocalization phases that are superimposed on the overall trend of increasing localization. The observed link between delocalization and host rock damage may help explain the varying localization of low magnitude seismicity in southern California. Models with more diffuse damage produce more complex fault geometries comprised of several parallel strands of wing cracks. The propagation of these wing cracks reduces the shear stress acting on the model boundaries, indicating that this fracture development increases the mechanical efficiency of the system." @default.
- W2334256980 created "2016-06-24" @default.
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- W2334256980 date "2012-11-01" @default.
- W2334256980 modified "2023-10-18" @default.
- W2334256980 title "A combined numerical modelling and mapping approach to the reconstructing of Younger Dryas Stadial glaciers in the South-West English Lake District" @default.
- W2334256980 doi "https://doi.org/10.1016/j.quaint.2012.08.1807" @default.
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