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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ftmdpi:oai:mdpi.com:/1996-1073/12/2/251/ 2023-08-20T04:04:33+02:00 Creep Behaviors of Methane Hydrate-Bearing Frozen Sediments Yanghui Li Peng Wu Xiang Sun Weiguo Liu Yongchen Song Jiafei Zhao 2019-01-15 application/pdf https://doi.org/10.3390/en12020251 EN eng Multidisciplinary Digital Publishing Institute L: Energy Sources https://dx.doi.org/10.3390/en12020251 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 12; Issue 2; Pages: 251 methane hydrate creep tests permafrost mechanical property Text 2019 ftmdpi https://doi.org/10.3390/en12020251 2023-07-31T21:58:22Z 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. Text Arctic Methane hydrate permafrost MDPI Open Access Publishing Arctic Energies 12 2 251 |
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Open Polar |
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MDPI Open Access Publishing |
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English |
topic |
methane hydrate creep tests permafrost mechanical property |
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methane hydrate creep tests permafrost mechanical property 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 |
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 |
Text |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/en12020251 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Methane hydrate permafrost |
genre_facet |
Arctic Methane hydrate permafrost |
op_source |
Energies; Volume 12; Issue 2; Pages: 251 |
op_relation |
L: Energy Sources https://dx.doi.org/10.3390/en12020251 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en12020251 |
container_title |
Energies |
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12 |
container_issue |
2 |
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251 |
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1774714933466890240 |