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DOI	10.1016/j.ijplas.2008.06.010
	Yield criterion and elasto-plastic damage constitutive model for frozen sandy soil
	Lai Yuanming; Jin Long; Chang Xiaoxiao
发表日期	2009
ISSN	0749-6419
EISSN	1879-2154
起始页码	1177
结束页码	1205
卷号	25 期号:6
英文摘要	A series of triaxial compression tests was carried out on a frozen sandy soil under confining pressures of 0-18 MPa at -6 degrees C. The experimental results indicate that, the strength of frozen sandy soil increases versus the increase in the confining pressures when sigma(3) <= 3 MPa, but decreases when sigma(3) > 3 MPa. This phenomenon is called the strengthening and weakening effects of confining pressures. A yield function, considering both effects, is proposed using the experimental method according to Drucker's postulate, and the mathematical expression of the hardening parameter, which can describe the softening and hardening phenomenon, is provided. An elasto-plastic constitutive model for frozen sandy soil is developed. Based on the continuum damage theory, the cross anisotropic damage variables are deduced and their change regularities are investigated. Then the elasto-plastic damage constitutive model is proposed by introducing damage variables into elasto-plastic constitutive model. The validity of the model is verified by comparing its modeling results with experimental results obtained from triaxial tests. It is found that, this model can predict the deformation regularity of frozen soil exactly. It can simulate the stress-strain process under high confining pressures when pressure melting phenomena appear especially well. (C) 2008 Elsevier Ltd. All rights reserved.
英文关键词	Frozen sandy soil; Pressure melting; Yield function; Cross anisotropic damage; Elasto-plastic damage constitutive model
语种	英语
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
WOS关键词	SUBLOADING SURFACE MODEL ; STRAIN RATE ; MECHANICS ; PLASTICITY ; EVOLUTION ; STRENGTH ; BEHAVIOR
WOS记录号	WOS:000265998800009
来源期刊	INTERNATIONAL JOURNAL OF PLASTICITY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239533
作者单位	[Lai Yuanming; Jin Long; Chang Xiaoxiao] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Lai Yuanming,Jin Long,Chang Xiaoxiao. Yield criterion and elasto-plastic damage constitutive model for frozen sandy soil[J],2009,25(6).
APA	Lai Yuanming,Jin Long,&Chang Xiaoxiao.(2009).Yield criterion and elasto-plastic damage constitutive model for frozen sandy soil.INTERNATIONAL JOURNAL OF PLASTICITY,25(6).
MLA	Lai Yuanming,et al."Yield criterion and elasto-plastic damage constitutive model for frozen sandy soil".INTERNATIONAL JOURNAL OF PLASTICITY 25.6(2009).