气候变化领域集成服务门户(CCPortal): An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess

CCPortal

DOI	10.1016/j.ijengsci.2014.06.011
	An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess
	Lai, Yuanming; Xu, Xiangtian; Yu, Wenbing; Qi, Jilin
发表日期	2014
ISSN	0020-7225
EISSN	1879-2197
起始页码	29
结束页码	53
卷号	84
英文摘要	For the engineering construction in cold regions, it is essential to understand the mechanical properties of frozen soil. In order to investigate the mechanical characteristics of frozen loess, three kinds of laboratory tests were carried out at -6 degrees C. These included constant-confining pressure triaxial compression tests, isotropic compression tests, and constant-slope stress path tests. The test results show that the direction of the plastic strain increment is influenced by stress path. The influence of the mechanism of the confining pressures on the strength and deformation of frozen loess is investigated in detail. An analytical method to determine pressure crushing and melting of the ice in frozen soil is proposed. In order to apply the hyperplasticity theory to modeling constitutive behavior of frozen soil, a new systematical approach to derive the yield criterion and flow rule from dissipation function is proposed based on the properties of homogenous function. From the mechanical characteristics of frozen loess, Gibbs free energy function and dissipation function of frozen loess are established by applying the hyperplasticity theory. An elasto-plastic incremental constitutive model for frozen loess is derived from the two thermodynamic functions and a method of determining the corresponding parameters is also given. Simulated results show that the constitutive model, proposed in this paper, describes well the deformation behavior of frozen loess under different stress levels and stress paths. (C) 2014 Elsevier Ltd. All rights reserved.
英文关键词	Frozen loess; Hyperplasticity theory; Stress path; Thermodynamic function; Constitutive model
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Multidisciplinary
WOS关键词	LARGE ELASTOPLASTIC DEFORMATIONS ; SUBLOADING SURFACE MODEL ; THERMOMECHANICAL FRAMEWORK ; RELAXED CONFIGURATIONS ; STRAIN BEHAVIOR ; PLASTICITY ; STRENGTH ; YIELD ; SOILS ; PREDICTION
WOS记录号	WOS:000342252400004
来源期刊	INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239500
作者单位	[Lai, Yuanming; Yu, Wenbing; Qi, Jilin] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Xu, Xiangtian] Inner Mongolia Univ, Inst Transportat, Hohhot 010070, Peoples R China
推荐引用方式 GB/T 7714	Lai, Yuanming,Xu, Xiangtian,Yu, Wenbing,et al. An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess[J],2014,84.
APA	Lai, Yuanming,Xu, Xiangtian,Yu, Wenbing,&Qi, Jilin.(2014).An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess.INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE,84.
MLA	Lai, Yuanming,et al."An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess".INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE 84(2014).