Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading
During the operation of the Salt Cavern Flow Battery (SCFB) system, the rock surrounding a salt cavern is subjected to erosion by the electrolyte. To study the creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading in SCFB, a triaxial creep experiment with a c...
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Frontiers Media S.A.
2024-11-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2024.1503158/full |
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| author | Si Huang Si Huang Jun Lu Jian Wang Xinghui Fu Yaping Fu Yinping Li Yinping Li Yinping Li Xilin Shi Xilin Shi Zhikai Dong Kai Zhao Kai Zhao Peng Li Peng Li Mingnan Xu Mingnan Xu Xiangsheng Chen |
| author_facet | Si Huang Si Huang Jun Lu Jian Wang Xinghui Fu Yaping Fu Yinping Li Yinping Li Yinping Li Xilin Shi Xilin Shi Zhikai Dong Kai Zhao Kai Zhao Peng Li Peng Li Mingnan Xu Mingnan Xu Xiangsheng Chen |
| author_sort | Si Huang |
| collection | DOAJ |
| description | During the operation of the Salt Cavern Flow Battery (SCFB) system, the rock surrounding a salt cavern is subjected to erosion by the electrolyte. To study the creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading in SCFB, a triaxial creep experiment with a cycle period of 1 day was conducted. The results indicated that, when not subjected to failure, the axial stress-strain curve of electrolyte-bearing sample undergoes only two phases of “sparse-dense”, entering dense phase approximately 4 cycles earlier than that of sample without electrolyte. Under the same stress conditions, the strain generated in electrolyte-bearing salt rock surpasses that of sample without electrolyte, demonstrating an initial rapid increase followed by a gradual stabilization trend. The stress-strain curve of electrolyte-bearing sample in a single cycle can be divided into six stages. The number of cycles has almost no effect on the axial strain in stages I, IV, V and VI, and the axial strain in stages IV and VI is basically 0. Additionally, the elastic deformation generated in stage I is basically recovered in stage V. The strain in stage II gradually decreases and disappears in the 4th cycle, which is 13 cycles earlier than that of the sample without electrolyte. The creep rate of electrolyte-bearing sample shows a trend of “gradual decrease—basically stabilization” as the number of cycles increases, and the creep experiment contains only the decay creep stage and steady creep stage. Irreversible deformation of electrolyte-bearing sample exhibits a gradual decrease followed by stabilization with increasing number of cycles. The research findings hold significant implications for the stability analysis of SCFB systems. |
| format | Article |
| id | doaj-art-99375a6086db4a4ca5b5f341773dbf92 |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj-art-99375a6086db4a4ca5b5f341773dbf922024-11-20T06:27:23ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632024-11-011210.3389/feart.2024.15031581503158Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loadingSi Huang0Si Huang1Jun Lu2Jian Wang3Xinghui Fu4Yaping Fu5Yinping Li6Yinping Li7Yinping Li8Xilin Shi9Xilin Shi10Zhikai Dong11Kai Zhao12Kai Zhao13Peng Li14Peng Li15Mingnan Xu16Mingnan Xu17Xiangsheng Chen18State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaPipeChina Energy Storage Technology Co., Ltd., Shanghai, ChinaPipeChina Energy Storage Technology Co., Ltd., Shanghai, ChinaJiangsu Suyan Jingshen Co., Ltd., Huai’an, ChinaPipeChina Energy Storage Technology Co., Ltd., Shanghai, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaHubei Key Laboratory of Geo-Environmental Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaSchool of Safety Engineering and Emergency Management, Shijiazhuang Tiedao University, Shijiazhuang, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, ChinaUniversity of Chinese Academy of Sciences, Beijing, ChinaSchool of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, ChinaDuring the operation of the Salt Cavern Flow Battery (SCFB) system, the rock surrounding a salt cavern is subjected to erosion by the electrolyte. To study the creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading in SCFB, a triaxial creep experiment with a cycle period of 1 day was conducted. The results indicated that, when not subjected to failure, the axial stress-strain curve of electrolyte-bearing sample undergoes only two phases of “sparse-dense”, entering dense phase approximately 4 cycles earlier than that of sample without electrolyte. Under the same stress conditions, the strain generated in electrolyte-bearing salt rock surpasses that of sample without electrolyte, demonstrating an initial rapid increase followed by a gradual stabilization trend. The stress-strain curve of electrolyte-bearing sample in a single cycle can be divided into six stages. The number of cycles has almost no effect on the axial strain in stages I, IV, V and VI, and the axial strain in stages IV and VI is basically 0. Additionally, the elastic deformation generated in stage I is basically recovered in stage V. The strain in stage II gradually decreases and disappears in the 4th cycle, which is 13 cycles earlier than that of the sample without electrolyte. The creep rate of electrolyte-bearing sample shows a trend of “gradual decrease—basically stabilization” as the number of cycles increases, and the creep experiment contains only the decay creep stage and steady creep stage. Irreversible deformation of electrolyte-bearing sample exhibits a gradual decrease followed by stabilization with increasing number of cycles. The research findings hold significant implications for the stability analysis of SCFB systems.https://www.frontiersin.org/articles/10.3389/feart.2024.1503158/fullsalt rockcreep characteristicstriaxial cyclic loadingelastic modulusstress-strain curve |
| spellingShingle | Si Huang Si Huang Jun Lu Jian Wang Xinghui Fu Yaping Fu Yinping Li Yinping Li Yinping Li Xilin Shi Xilin Shi Zhikai Dong Kai Zhao Kai Zhao Peng Li Peng Li Mingnan Xu Mingnan Xu Xiangsheng Chen Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading Frontiers in Earth Science salt rock creep characteristics triaxial cyclic loading elastic modulus stress-strain curve |
| title | Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading |
| title_full | Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading |
| title_fullStr | Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading |
| title_full_unstemmed | Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading |
| title_short | Experimental study on creep characteristics of electrolyte-bearing salt rock under long-term triaxial cyclic loading |
| title_sort | experimental study on creep characteristics of electrolyte bearing salt rock under long term triaxial cyclic loading |
| topic | salt rock creep characteristics triaxial cyclic loading elastic modulus stress-strain curve |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1503158/full |
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