Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments
Creep behaviors of methane hydrate-bearing frozen specimens are important to predict the long-term stability of the hydrate-bearing layers in Arctic and permafrost regions. In this study, a series of creep tests were conducted, and the results indicated that: (1) higher deviator stress (external loa...
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| Format: | Article |
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MDPI AG
2019-01-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/12/2/251 |
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| author | Yanghui Li Peng Wu Xiang Sun Weiguo Liu Yongchen Song Jiafei Zhao |
| author_facet | Yanghui Li Peng Wu Xiang Sun Weiguo Liu Yongchen Song Jiafei Zhao |
| author_sort | Yanghui Li |
| collection | DOAJ |
| description | Creep behaviors of methane hydrate-bearing frozen specimens are important to predict the long-term stability of the hydrate-bearing layers in Arctic and permafrost regions. In this study, a series of creep tests were conducted, and the results indicated that: (1) higher deviator stress (external load) results in larger initial strain, axial strain, and strain rate at a specific elapsed time. Under low deviator stress levels, the axial strain is not large and does not get into the tertiary creep stage in comparison with that under high deviator stress, which can be even up to 35% and can cause failure; (2) both axial strain and strain rate of methane hydrate-bearing frozen specimens increase with the enhancement of deviator stress, the decrease of confining pressure, and the decrease of temperature; (3) the specimens will be damaged rather than in stable creep stage during creeping when the deviator stress exceeds the quasi-static strength of the specimens. |
| first_indexed | 2024-04-11T22:50:12Z |
| format | Article |
| id | doaj.art-97257de011db41e8bea71c13368187cd |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T22:50:12Z |
| publishDate | 2019-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-97257de011db41e8bea71c13368187cd2022-12-22T03:58:36ZengMDPI AGEnergies1996-10732019-01-0112225110.3390/en12020251en12020251Creep Behaviors of Methane Hydrate-Bearing Frozen SedimentsYanghui Li0Peng Wu1Xiang Sun2Weiguo Liu3Yongchen Song4Jiafei Zhao5Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, ChinaCreep behaviors of methane hydrate-bearing frozen specimens are important to predict the long-term stability of the hydrate-bearing layers in Arctic and permafrost regions. In this study, a series of creep tests were conducted, and the results indicated that: (1) higher deviator stress (external load) results in larger initial strain, axial strain, and strain rate at a specific elapsed time. Under low deviator stress levels, the axial strain is not large and does not get into the tertiary creep stage in comparison with that under high deviator stress, which can be even up to 35% and can cause failure; (2) both axial strain and strain rate of methane hydrate-bearing frozen specimens increase with the enhancement of deviator stress, the decrease of confining pressure, and the decrease of temperature; (3) the specimens will be damaged rather than in stable creep stage during creeping when the deviator stress exceeds the quasi-static strength of the specimens.http://www.mdpi.com/1996-1073/12/2/251methane hydratecreep testspermafrostmechanical property |
| spellingShingle | Yanghui Li Peng Wu Xiang Sun Weiguo Liu Yongchen Song Jiafei Zhao Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments Energies methane hydrate creep tests permafrost mechanical property |
| title | Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments |
| title_full | Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments |
| title_fullStr | Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments |
| title_full_unstemmed | Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments |
| title_short | Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments |
| title_sort | creep behaviors of methane hydrate bearing frozen sediments |
| topic | methane hydrate creep tests permafrost mechanical property |
| url | http://www.mdpi.com/1996-1073/12/2/251 |
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