气候变化领域集成服务门户(CCPortal): A DEM-based Generic Modeling Framework for Hydrate-Bearing Sediments

CCPortal

DOI	10.1016/j.compgeo.2024.106287
	A DEM-based Generic Modeling Framework for Hydrate-Bearing Sediments
	Wang, Pei; Xu, Chengkai; Yin, Zhen-Yu; Song, Shun-xiang; Xu, Changjie; Dai, Sheng
发表日期	2024
ISSN	0266-352X
EISSN	1873-7633
起始页码	171
卷号	171
英文摘要	Natural hydrate-bearing sediments attract broad attention due to their important role in natural gas extraction and climate change. Their mechanical behavior, governed by hydrate saturation and spatial distribution (i.e. pore habits), requires in-depth understanding. The discrete element method (DEM) serves as an important tool to reveal the micromechanics of particle-hydrate interactions and the macroscopic behavior of hydrate-bearing sediments. However, a comprehensively validated DEM modeling of hydrate-bearing sediments is missing in previous studies. This study introduces a generic DEM-based modeling framework for hydrate-bearing sands, integrating modeling and parameter calibrations for various pore habits. The framework's efficacy is demonstrated through calibration against triaxial tests of hydrate, sand, and hydrate-bearing sands, yielding close agreement between the experimental observations and simulation results. Utilizing this modeling framework, the impact of pore habits on the mechanical behavior of hydrate-bearing sands is investigated. Results show that the strength and stiffness of hydrate-bearing sands are significantly enhanced by the presence of hydrate, and this enhancement is modulated by hydrate pore habits. In addition, compared with pure sand, hydrate-bearing sand exhibits a narrower shear band, a lower particle rotation angle, and a more brittle failure pattern. The findings advocate for considering hydrate pore habits to accurately predict sediment behavior.
英文关键词	Hydrate -bearing sediments; Discrete element method; Pore habit; Mechanical property
语种	英语
WOS研究方向	Computer Science ; Engineering ; Geology
WOS类目	Computer Science, Interdisciplinary Applications ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:001232077700001
来源期刊	COMPUTERS AND GEOTECHNICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296225
作者单位	East China Jiaotong University; East China Jiaotong University; Hong Kong Polytechnic University; University System of Georgia; Georgia Institute of Technology
推荐引用方式 GB/T 7714	Wang, Pei,Xu, Chengkai,Yin, Zhen-Yu,et al. A DEM-based Generic Modeling Framework for Hydrate-Bearing Sediments[J],2024,171.
APA	Wang, Pei,Xu, Chengkai,Yin, Zhen-Yu,Song, Shun-xiang,Xu, Changjie,&Dai, Sheng.(2024).A DEM-based Generic Modeling Framework for Hydrate-Bearing Sediments.COMPUTERS AND GEOTECHNICS,171.
MLA	Wang, Pei,et al."A DEM-based Generic Modeling Framework for Hydrate-Bearing Sediments".COMPUTERS AND GEOTECHNICS 171(2024).