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DOI	10.1177/10567895211045422
	A novel approach for characterizing frozen soil damage based on mesostructure
	Chen, Shijie; Ma, Wei; Li, Guoyu
通讯作者	Chen, SJ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	1056-7895
EISSN	1530-7921
起始页码	444
结束页码	463
卷号	31 期号:3
英文摘要	In this study, the relationship between the computed tomography (CT) number and the density of frozen soil was established on a macro and mesoscopic scale, aimed at overcoming the shortcomings of the mesoscopic damage behavior predicted by previous macroscopic research on frozen soil. In addition, considering the influence of stress level and temperature, a mesoscopic structural damage variable was proposed, which could reflect the damage characteristics of frozen soil. On this basis, combining the meso-damage of frozen soil with the macro-mechanical response, the mechanism of the damage evolution of frozen soil under stress was studied. It was found that the variation law of porosity was consistent with the law of the mesoscopic damage expansion in frozen soil. In the initial stage of stress loading, compaction was observed before meso-crack expansion. The internal structure exhibited a strengthening effect, by which the damage was reduced. The macroscopic mechanical properties were characterized by an elastic strain phase. As the stress continued to increase, an inflection point of the damage value appeared, and the damage gradually increased. The starting point of the meso-fracture expansion curve could represent the stress yield point on the macroscopic mechanical curve, and also represented the inflection point of the volume change of the material from the contraction to the dilatancy. When the damage value was gradually increased and became equal to the initial value, the deviatoric stress reached the peak of the macroscopic mechanical curve.
关键词	CONSTITUTIVE MODEL CLAY
英文关键词	Frozen soil; CT scanning; mesoscopic damage; real-time loading
语种	英语
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000693953600001
来源期刊	INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253830
作者单位	[Chen, Shijie; Ma, Wei; Li, Guoyu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Ma, Wei; Li, Guoyu] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chen, Shijie,Ma, Wei,Li, Guoyu. A novel approach for characterizing frozen soil damage based on mesostructure[J]. 中国科学院西北生态环境资源研究院,2022,31(3).
APA	Chen, Shijie,Ma, Wei,&Li, Guoyu.(2022).A novel approach for characterizing frozen soil damage based on mesostructure.INTERNATIONAL JOURNAL OF DAMAGE MECHANICS,31(3).
MLA	Chen, Shijie,et al."A novel approach for characterizing frozen soil damage based on mesostructure".INTERNATIONAL JOURNAL OF DAMAGE MECHANICS 31.3(2022).