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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ftdoajarticles:oai:doaj.org/article:97257de011db41e8bea71c13368187cd 2023-05-15T15:04:16+02:00 Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments Yanghui Li Peng Wu Xiang Sun Weiguo Liu Yongchen Song Jiafei Zhao 2019-01-01T00:00:00Z https://doi.org/10.3390/en12020251 https://doaj.org/article/97257de011db41e8bea71c13368187cd EN eng MDPI AG http://www.mdpi.com/1996-1073/12/2/251 https://doaj.org/toc/1996-1073 1996-1073 doi:10.3390/en12020251 https://doaj.org/article/97257de011db41e8bea71c13368187cd Energies, Vol 12, Iss 2, p 251 (2019) methane hydrate creep tests permafrost mechanical property Technology T article 2019 ftdoajarticles https://doi.org/10.3390/en12020251 2022-12-30T20:46:02Z 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. Article in Journal/Newspaper Arctic Methane hydrate permafrost Directory of Open Access Journals: DOAJ Articles Arctic Energies 12 2 251 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
methane hydrate creep tests permafrost mechanical property Technology T |
spellingShingle |
methane hydrate creep tests permafrost mechanical property Technology T Yanghui Li Peng Wu Xiang Sun Weiguo Liu Yongchen Song Jiafei Zhao Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments |
topic_facet |
methane hydrate creep tests permafrost mechanical property Technology T |
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. |
format |
Article in Journal/Newspaper |
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 |
title |
Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments |
title_short |
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_sort |
creep behaviors of methane hydrate-bearing frozen sediments |
publisher |
MDPI AG |
publishDate |
2019 |
url |
https://doi.org/10.3390/en12020251 https://doaj.org/article/97257de011db41e8bea71c13368187cd |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Methane hydrate permafrost |
genre_facet |
Arctic Methane hydrate permafrost |
op_source |
Energies, Vol 12, Iss 2, p 251 (2019) |
op_relation |
http://www.mdpi.com/1996-1073/12/2/251 https://doaj.org/toc/1996-1073 1996-1073 doi:10.3390/en12020251 https://doaj.org/article/97257de011db41e8bea71c13368187cd |
op_doi |
https://doi.org/10.3390/en12020251 |
container_title |
Energies |
container_volume |
12 |
container_issue |
2 |
container_start_page |
251 |
_version_ |
1766336064669089792 |