Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples
Studying the strength and deformation properties of sediments containing gas hydrates is one of the key problems during the process of hydrate resource exploitation. In this paper, considering the effects of temperatures (−5, −3, −1 °C), confining pressures (0.5, 1, 2 MPa) and porosities (40%, 80%)...
Published in: | Energies |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2019
|
Subjects: | |
Online Access: | https://doi.org/10.3390/en12224277 |
id |
ftmdpi:oai:mdpi.com:/1996-1073/12/22/4277/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/1996-1073/12/22/4277/ 2023-08-20T04:07:57+02:00 Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples Xudong Zhang Yiming Zhu Zhanfeng Ying Tingting Luo 2019-11-09 application/pdf https://doi.org/10.3390/en12224277 EN eng Multidisciplinary Digital Publishing Institute K: Energy Sources https://dx.doi.org/10.3390/en12224277 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 12; Issue 22; Pages: 4277 methane hydrate-bearing sediments stress–strain relationship skeleton curve dynamic modulus constitutive model Text 2019 ftmdpi https://doi.org/10.3390/en12224277 2023-07-31T22:46:48Z Studying the strength and deformation properties of sediments containing gas hydrates is one of the key problems during the process of hydrate resource exploitation. In this paper, considering the effects of temperatures (−5, −3, −1 °C), confining pressures (0.5, 1, 2 MPa) and porosities (40%, 80%) on the dynamic modulus characteristics of sediments containing methane hydrates, several dynamic loading experiments were conducted. The results show that the sediment structure was more easily destroyed under a larger amplitude of dynamic loading. According to the dynamic stress–strain curves, the skeleton curves of the sediment samples were obtained, and it was shown that the deformation behaved with elastic characteristics in the initial stage, and then plastic deformation increased gradually and played a leading role with the increase in external loading. The maximum dynamic elastic modulus of sediments was reduced under the conditions of higher temperature and porosity, and effectively enhanced under higher confining pressure. Finally, on the basis of the Hardin–Drnevich equivalent model, and considering the influences of temperatures and confining pressures on model parameters, a viscoelastic constitutive model applied to analyze the dynamic modulus characteristics of sediments containing methane hydrate was established. The comparison showed that these calculated values of sediments’ dynamic elastic modulus accorded quite well with the experimental values. Text Methane hydrate MDPI Open Access Publishing Energies 12 22 4277 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
methane hydrate-bearing sediments stress–strain relationship skeleton curve dynamic modulus constitutive model |
spellingShingle |
methane hydrate-bearing sediments stress–strain relationship skeleton curve dynamic modulus constitutive model Xudong Zhang Yiming Zhu Zhanfeng Ying Tingting Luo Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples |
topic_facet |
methane hydrate-bearing sediments stress–strain relationship skeleton curve dynamic modulus constitutive model |
description |
Studying the strength and deformation properties of sediments containing gas hydrates is one of the key problems during the process of hydrate resource exploitation. In this paper, considering the effects of temperatures (−5, −3, −1 °C), confining pressures (0.5, 1, 2 MPa) and porosities (40%, 80%) on the dynamic modulus characteristics of sediments containing methane hydrates, several dynamic loading experiments were conducted. The results show that the sediment structure was more easily destroyed under a larger amplitude of dynamic loading. According to the dynamic stress–strain curves, the skeleton curves of the sediment samples were obtained, and it was shown that the deformation behaved with elastic characteristics in the initial stage, and then plastic deformation increased gradually and played a leading role with the increase in external loading. The maximum dynamic elastic modulus of sediments was reduced under the conditions of higher temperature and porosity, and effectively enhanced under higher confining pressure. Finally, on the basis of the Hardin–Drnevich equivalent model, and considering the influences of temperatures and confining pressures on model parameters, a viscoelastic constitutive model applied to analyze the dynamic modulus characteristics of sediments containing methane hydrate was established. The comparison showed that these calculated values of sediments’ dynamic elastic modulus accorded quite well with the experimental values. |
format |
Text |
author |
Xudong Zhang Yiming Zhu Zhanfeng Ying Tingting Luo |
author_facet |
Xudong Zhang Yiming Zhu Zhanfeng Ying Tingting Luo |
author_sort |
Xudong Zhang |
title |
Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples |
title_short |
Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples |
title_full |
Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples |
title_fullStr |
Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples |
title_full_unstemmed |
Experimental Investigation on the Dynamic Modulus Properties of Methane Hydrate Sediment Samples |
title_sort |
experimental investigation on the dynamic modulus properties of methane hydrate sediment samples |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/en12224277 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Energies; Volume 12; Issue 22; Pages: 4277 |
op_relation |
K: Energy Sources https://dx.doi.org/10.3390/en12224277 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en12224277 |
container_title |
Energies |
container_volume |
12 |
container_issue |
22 |
container_start_page |
4277 |
_version_ |
1774719936049971200 |