An extended numerical manifold method for unsaturated soil-water interaction analysis at micro-scale

doi:10.1002/nag.3211

	An extended numerical manifold method for unsaturated soil-water interaction analysis at micro-scale
	Sun, Hao 1,2; Wu, Zhijun 2; Zheng, Liange 1; Yang, Yongtao 4; Huang, Da 3
刊名	INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
	2021-04-17
页码	26
关键词	capillary water microscopic analysis numerical manifold method soil‐ water interaction unsaturated soil
ISSN号	0363-9061
DOI	10.1002/nag.3211
英文摘要	To investigate unsaturated soil-water interaction at micro-scale, this study extends the numerical manifold method (NMM) by incorporating a soil-water coupling model considering specific capillary water distribution and capillary force calculation. The soil skeleton is constructed by a soil skeleton generation algorithm with random polygons. To more realistically capture the interaction between soil grains and capillary water, a capillary mechanics-based geometric algorithm is proposed to iteratively calculate the capillary water distribution. The capillary forces corresponding to the capillary water distribution are calculated based on the Young-Laplace equation. The proposed capillary water solving framework is first verified by reproducing the soil-water characteristic curve and the capillary water distribution of an ideal contact-disk model against analytical solutions. To further validate the ability of the capillary water solving framework to predict hydraulic behavior of the real soil, a laboratory test on the Toyoura sand is reproduced numerically. Then an ideal direct shear test is performed to further validate the two-way soil-water coupling procedure, in which a comparison between the numerical and analytical results regarding the shear strength and matric suction is presented. Finally, microscopic hydraulic and compression tests are conducted on two soil specimens with the same porosity and mean grain diameter but different uniformity coefficients. The results elucidate that the extended method is a potential tool to explore unsaturated soil behaviors at micro-scale.
资助项目	National Key Research and Development Program of China[2017YFC1501302] ; National Natural Science Foundation of China[42077246] ; National Natural Science Foundation of China[41772309] ; National Natural Science Foundation of China[41941018] ; OutstandingYouth Foundation of Hubei Province, China[2019CFA074] ; China ScholarshipCouncil[201906270145]
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
出版者	WILEY
WOS记录号	WOS:000640791100001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/26012]
专题	中科院武汉岩土力学所
通讯作者	Wu, Zhijun
作者单位	1.Lawrence Berkeley Natl Lab, Energy Geosci Div, Earth & Environm Sci Area, Berkeley, CA USA 2.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China 3.Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Sun, Hao,Wu, Zhijun,Zheng, Liange,et al. An extended numerical manifold method for unsaturated soil-water interaction analysis at micro-scale[J]. INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,2021:26.
APA	Sun, Hao,Wu, Zhijun,Zheng, Liange,Yang, Yongtao,&Huang, Da.(2021).An extended numerical manifold method for unsaturated soil-water interaction analysis at micro-scale.INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,26.
MLA	Sun, Hao,et al."An extended numerical manifold method for unsaturated soil-water interaction analysis at micro-scale".INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS (2021):26.