An Elastoplastic Constitutive Model for Unsaturated Soils Using the Suction Stress Variable

doi:10.1007/s11204-022-09780-0

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	An Elastoplastic Constitutive Model for Unsaturated Soils Using the Suction Stress Variable
	Zhou, Fengxi 1,2; Shao, Yanping 1; Ahmed, Musa Abdallah Ibrahim 1
刊名	SOIL MECHANICS AND FOUNDATION ENGINEERING
	2022-03-01
卷号	59 期号:1 页码:23-31
关键词	CamsConstitutive modelsCritical current density (superconductivity)Orthogonal functionsShear stressSoilsTexturesUnsaturated polymers Critical state linesEffective stressElastoplastic constitutive modelIntergranularMatric suctionsModified cam clay modelsModified Cam-clay modelStress variablesSuction stressUnsaturated soil
ISSN号	0038-0741
DOI	10.1007/s11204-022-09780-0
英文摘要	Based on the principle of effective stress of unsaturated soil expressed by intergranular suction stress combined with experimental data, the critical state lines under different matric suctions are unified into a single straight line. Based on this result, a new unsaturated soil dilatancy equation is proposed. First, combined with orthogonal conditions, the average effective stress and generalized shear stress are used as stress parameters to obtain the plastic potential function. Second, an incremental elastoplastic constitutive model is derived by using the yield surface of the modified Cam-Clay model and non-associated flow rule; the new constitutive model reduces to the modified Cam-Clay model for saturated soil. Stress-strain curves calculated by the model are compared with experimental results for different stress paths. The results of the comparison show that the elastoplastic constitutive model established in this work can accurately predict the stress-strain relationship of unsaturated soils.
WOS研究方向	Engineering
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000790171100001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158635]
专题	土木工程学院
作者单位	1.Lanzhou Univ Technol, Coll Civil Engn, Dept Geotech Engn, Lanzhou, Peoples R China; 2.Lanzhou Univ Technol, Western Engn Res Ctr Disaster Mitigat Civil Engn, Minist Educ, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Fengxi,Shao, Yanping,Ahmed, Musa Abdallah Ibrahim. An Elastoplastic Constitutive Model for Unsaturated Soils Using the Suction Stress Variable[J]. SOIL MECHANICS AND FOUNDATION ENGINEERING,2022,59(1):23-31.
APA	Zhou, Fengxi,Shao, Yanping,&Ahmed, Musa Abdallah Ibrahim.(2022).An Elastoplastic Constitutive Model for Unsaturated Soils Using the Suction Stress Variable.SOIL MECHANICS AND FOUNDATION ENGINEERING,59(1),23-31.
MLA	Zhou, Fengxi,et al."An Elastoplastic Constitutive Model for Unsaturated Soils Using the Suction Stress Variable".SOIL MECHANICS AND FOUNDATION ENGINEERING 59.1(2022):23-31.