Format:
1 Online-Ressource (xi, 187 Seiten, 20088 KB)
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Illustrationen, Diagramme, Karten
Content:
Fluids in the Earth's crust can move by creating and flowing through fractures, in a process called `hydraulic fracturing’. The tip-line of such fluid-filled fractures grows at locations where stress is larger than the strength of the rock. Where the tip stress vanishes, the fracture closes and the fluid-front retreats. If stress gradients exist on the fracture's walls, induced by fluid/rock density contrasts or topographic stresses, this results in an asymmetric shape and growth of the fracture, allowing for the contained batch of fluid to propagate through the crust. The state-of-the-art analytical and numerical methods to simulate fluid-filled fracture propagation are two-dimensional (2D). In this work I extend these to three dimensions (3D). In my analytical method, I approximate the propagating 3D fracture as a penny-shaped crack that is influenced by both an internal pressure and stress gradients. In addition, I develop a numerical method to model propagation where curved fractures can be simulated as a mesh of triangular ...
Note:
kumulative Dissertation
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Dissertation Universität Potsdam 2021
Additional Edition:
Erscheint auch als Druck-Ausgabe Davis, Timothy An analytical and numerical analysis of fluid-filled crack propagation in three dimensions Potsdam, 2020
Language:
English
Keywords:
Gebirgsmechanik
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Fluid
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Riss
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Randelemente-Methode
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Hochschulschrift
DOI:
10.25932/publishup-50960
URN:
urn:nbn:de:kobv:517-opus4-509609
URL:
https://doi.org/10.25932/publishup-50960
URL:
https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-509609
URL:
https://d-nb.info/1236786645/34