Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments
Abstract Natural gas hydrate (NGH) is widely distributed in marine sediments and continental permafrost, which is a promising energy resource. The sustainable and safe exploration and production of NGH requires fully understanding of its mechanical behaviors, which is still a challenge to our commun...
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crwiley:10.1002/ese3.968 2024-06-02T08:13:06+00:00 Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments Wang, Feifei Wang, Zizhen Zhang, Di Wang, Zhenqing National Natural Science Foundation of China 2021 http://dx.doi.org/10.1002/ese3.968 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ese3.968 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ese3.968 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Energy Science & Engineering volume 9, issue 11, page 2079-2098 ISSN 2050-0505 2050-0505 journal-article 2021 crwiley https://doi.org/10.1002/ese3.968 2024-05-03T12:00:43Z Abstract Natural gas hydrate (NGH) is widely distributed in marine sediments and continental permafrost, which is a promising energy resource. The sustainable and safe exploration and production of NGH requires fully understanding of its mechanical behaviors, which is still a challenge to our community. In this paper, a statistical damage constitutive model named SC‐SDCM is developed for NGH sediments. The NGH sediments are regarded as two phases: the matrix phase of solid mineral grains, pore fluid, and gas, and the inclusion phase of hydrate crystal. The effective elastic parameters of such two‐phase composite are estimated by self‐consistent method (SC) according to the equivalent inclusion principle of micromechanics. The mesoscopic element strength of the NGH sediments is described by the Weibull statistical distribution and the damage theory of composite materials. And then combined with the Drucker‐Prager failure criterion of microelement, the damage constitutive model of NGH sediments is established. The new SC‐SDCM is tested to be reliable and robust by triaxial experimental observations on artificial cores and naturally occurring samples under different confining pressures and hydrate saturations. The SC‐SDCM could properly describe the stiffness, peak strength, and strain softening properties of the NGH sediments. Moreover, the predictions of SC‐SDCM are closest to the experiment observations compared to several published constitutive models, especially for the near‐ and after‐damage stages with relatively high hydrate saturation. Article in Journal/Newspaper permafrost Wiley Online Library Energy Science & Engineering 9 11 2079 2098 |
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English |
description |
Abstract Natural gas hydrate (NGH) is widely distributed in marine sediments and continental permafrost, which is a promising energy resource. The sustainable and safe exploration and production of NGH requires fully understanding of its mechanical behaviors, which is still a challenge to our community. In this paper, a statistical damage constitutive model named SC‐SDCM is developed for NGH sediments. The NGH sediments are regarded as two phases: the matrix phase of solid mineral grains, pore fluid, and gas, and the inclusion phase of hydrate crystal. The effective elastic parameters of such two‐phase composite are estimated by self‐consistent method (SC) according to the equivalent inclusion principle of micromechanics. The mesoscopic element strength of the NGH sediments is described by the Weibull statistical distribution and the damage theory of composite materials. And then combined with the Drucker‐Prager failure criterion of microelement, the damage constitutive model of NGH sediments is established. The new SC‐SDCM is tested to be reliable and robust by triaxial experimental observations on artificial cores and naturally occurring samples under different confining pressures and hydrate saturations. The SC‐SDCM could properly describe the stiffness, peak strength, and strain softening properties of the NGH sediments. Moreover, the predictions of SC‐SDCM are closest to the experiment observations compared to several published constitutive models, especially for the near‐ and after‐damage stages with relatively high hydrate saturation. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Wang, Feifei Wang, Zizhen Zhang, Di Wang, Zhenqing |
spellingShingle |
Wang, Feifei Wang, Zizhen Zhang, Di Wang, Zhenqing Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments |
author_facet |
Wang, Feifei Wang, Zizhen Zhang, Di Wang, Zhenqing |
author_sort |
Wang, Feifei |
title |
Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments |
title_short |
Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments |
title_full |
Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments |
title_fullStr |
Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments |
title_full_unstemmed |
Statistical damage constitutive model based on self‐consistent Eshelby method for natural gas hydrate sediments |
title_sort |
statistical damage constitutive model based on self‐consistent eshelby method for natural gas hydrate sediments |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/ese3.968 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ese3.968 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ese3.968 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Energy Science & Engineering volume 9, issue 11, page 2079-2098 ISSN 2050-0505 2050-0505 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ese3.968 |
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Energy Science & Engineering |
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9 |
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11 |
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2079 |
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2098 |
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1800759764926332928 |