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Research on fatigue damage and dilatancy properties for salt rock under discontinuous cyclic loading

Abstract : Since the salt cavern storage of natural gas and compressed air plays a critical role in ensuring the energy supply and adjusting the seasonal imbalance of power, China government has been constructing numerous new storages in recent years. Because of the seasonal of the seasonal variations of the gas/air pressure, the storages undergo cyclic loading, which causes rock fatigue and induces the associated safety and environmental hazards. The investigation of the discontinuous fatigue of salt under cyclic loading is therefore very important and is the subject of this study, which focuses on the experimental investigations and the development of the constitutive models describing the fatigue deformation. This thesis includes the following principal parts: ① Conventional cyclic loading testing to investigate the basic properties of fatigue in salt. ② Discontinuous cyclic loading tests testing to investigate the discontinuous fatigue. ③ Acoustic emission detecting experimentation to track the evolution of the fatigue damage in the salt. ④ Development of the fatigue life model and constitutive model for the discontinuous fatigue, based on the obtained experimental results.
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  • HAL Id : tel-01674225, version 2

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Jinyang Fan. Research on fatigue damage and dilatancy properties for salt rock under discontinuous cyclic loading. Earth Sciences. Chongqing university, 2017. English. ⟨NNT : 2017AZUR4030⟩. ⟨tel-01674225v2⟩

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