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- W4322006422 abstract "We propose a numerical model of laboratory earthquake cycle inspired by a set of experiments performed on a triaxial apparatus on sawcut Carrara marble samples. The model couples two representations of rock matter: rock is essentially represented as an elastic continuum, except in the vicinity of the sliding interface, where a discrete representation is employed. This allows to simulate in a single framework the storage and release of strain energy in the bulk of the sample and in the loading system, the damage of rock due to sliding, and the progressive production of a granular gouge layer in the interface. After independent calibration, we find that the tribosystem spontaneously evolves towards a stick-slip sliding regime, mimicking in a satisfactory way the behaviour observed in the lab. The model offers insights on complex phenomena which are out of reach in experiments. This includes the variability in space and time of the fields of stress and effective friction along the fault, the progressive thickening of the damaged region of rock around the interface, and the build-up of a granular layer of gouge accommodating shear. We present in detail several typical sliding events, we illustrate the fault heterogeneity, and we analyse quantitatively the damage rate in the numerical samples." @default.
- W4322006422 created "2023-02-26" @default.
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- W4322006422 date "2023-05-15" @default.
- W4322006422 modified "2023-09-30" @default.
- W4322006422 title "On-fault damage evolution in laboratory earthquakes: a numerical perspective on fault complexity" @default.
- W4322006422 doi "https://doi.org/10.5194/egusphere-egu23-6517" @default.
- W4322006422 hasPublicationYear "2023" @default.
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