Mechanisms of Deformation in Porous Rocks at the Grain Scale
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This paper investigates two dominant pore-scale deformation mechanisms in porous rocks: crystal plasticity and micro-fracture generation. Modeling and simulation are conducted on the mesoscopic scale, defined as a scale smaller than the specimen but larger than the grain. Imperfections are introduced in the form of random voids and random crystal orientations. Depending on the imposed overall deformation, the overall stress response could vary dramatically with assumed pore-scale mechanisms.
KeywordsSlip System Volumetric Strain Crystal Plasticity Frictional Resistance Porous Rock
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Geosciences Research Program, under Award Number DE-FG02-03ER15454. Support for the first author is provided in part by the Stanford Graduate Fellowship (SGF).
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