An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess (SCI)
	Lai Y. M. ; Xu X. T. ; Yu W. B. ; Qi J. L.
刊名	International Journal of Engineering Science
	2014
卷号	84 期号:29-53
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.
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/24961]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Lai Y. M.,Xu X. T.,Yu W. B.,et al. An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess (SCI)[J]. International Journal of Engineering Science,2014,84(29-53).
APA	Lai Y. M.,Xu X. T.,Yu W. B.,&Qi J. L..(2014).An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess (SCI).International Journal of Engineering Science,84(29-53).
MLA	Lai Y. M.,et al."An experimental investigation of the mechanical behavior and a hyperplastic constitutive model of frozen loess (SCI)".International Journal of Engineering Science 84.29-53(2014).