Title:
Fabric-based modeling of thermo-mechanical damage and healing around salt caverns
Fabric-based modeling of thermo-mechanical damage and healing around salt caverns
Author(s)
Zhu, Cheng
Arson, Chloé
Arson, Chloé
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Abstract
Geotechnical reservoirs and repositories in salt such as nuclear waste disposals, geothermal systems,
and compressed air energy storage (CAES) are usually subject to complex thermo-mechanical conditions,
leading to crack initiation, propagation, and rebonding. This work aims to model thermo-mechanical
damage and healing around salt caverns, by enriching the framework of continuum damage mechanics with
fabric descriptors. In order to infer the form of fabric tensors from microstructure observations, we carry out
creep tests on granular salt under constant stress and humidity conditions. We simulate a stress path typical of
CAES conditions at the material element level. The model presented in this paper is expected to improve the
fundamental understanding of damage and healing in rocks at both macroscopic and microscopic levels, and
the long-term evaluation of geological storage facilities.
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Date Issued
2015-05
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Proceedings