Numerical modelling of gassy sand behaviour under monotonic loading

doi:10.1007/s11440-021-01323-5

	Numerical modelling of gassy sand behaviour under monotonic loading
	Chen, Cheng; Wang, Yong; Zhang, Xianwei; Kong, Lingwei; Xu, Guofang
刊名	ACTA GEOTECHNICA
	2021-08-18
期号	-页码:14
关键词	Bounding surface plasticity Gassy sand Implicit constitutive integration State parameter Two-phase saturated media UEL
ISSN号	1861-1125
DOI	10.1007/s11440-021-01323-5
英文摘要	The mechanical behaviour of gassy sand is rather complex owing to the inherent complex nature of sand and the occluded/dissolved gas. For better understanding of the behaviour of gassy sand under monotonic loading, a numerical model is presented in this paper. By considering the gas-water mixture in gassy sand as a homogenous pore fluid, the theory of two-phase saturated porous media is employed. Based on this theory, the impact of the occluded/dissolved gas is characterized by the relationship between the compressibility of pore fluid and the degree of saturation as well as the pore fluid pressure, derived from Boyle's and Henry's Laws. Then an advanced constitutive model for sand is combined with the porous media theory to capture the complex stress-strain behaviour of sand, using a single set of model parameters. Through the spatial and temporal discretization of the governing equations by the finite element method and the well-known theta-method, the porous model is numerically implemented as a user-defined element subroutine provided by ABAQUS, in which the implicit constitutive integration algorithm is used. Finally, the influences of gas type, degree of saturation, pore fluid pressure level, and physical state (void ratio and stress level) on the behaviour of gassy sand are studied by the numerical model. The model is validated by comparing the simulated results with laboratory test data from literature.
资助项目	National Natural Science Foundation of China[41972293] ; National Natural Science Foundation of China[51979269] ; National Natural Science Foundation of China[41972285] ; CAS Pioneer Hundred Talents Program[2018-040] ; Youth Innovation Promotion Association CAS[2018363]
WOS研究方向	Engineering
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000686084700002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27690]
专题	中科院武汉岩土力学所
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Xiaohongshan 2, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Chen, Cheng,Wang, Yong,Zhang, Xianwei,et al. Numerical modelling of gassy sand behaviour under monotonic loading[J]. ACTA GEOTECHNICA,2021(-):14.
APA	Chen, Cheng,Wang, Yong,Zhang, Xianwei,Kong, Lingwei,&Xu, Guofang.(2021).Numerical modelling of gassy sand behaviour under monotonic loading.ACTA GEOTECHNICA(-),14.
MLA	Chen, Cheng,et al."Numerical modelling of gassy sand behaviour under monotonic loading".ACTA GEOTECHNICA .-(2021):14.