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DOI	10.1016/j.mechmat.2021.104073
	Damage model of unsaturated frozen soil while considering the influence of temperature rise under impact loading
	Fu, Tiantian; Zhu, Zhiwu; Ma, Wei; Zhang, Fulai
通讯作者	Zhu, ZW (通讯作者)，Southwest Jiaotong Univ, Sch Mech & Engn, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu 610031, Sichuan, Peoples R China.
发表日期	2021
ISSN	0167-6636
EISSN	1872-7743
卷号	163
英文摘要	Constitutive models and damage laws of frozen soil under high strain rates are crucial for the design of underground soil structures, and they lay an essential foundation for the research of instability phenomena in cold region engineering. The expansion and evolution of micro-defects and temperature damage are two basic mechanisms that control the macro and micro damage behavior of frozen soil. Considering frozen soil as a composite material, this study analyzes the damage mechanism of brittle materials subjected to impact loading. Finally, a dynamic model of unsaturated frozen soil under high pressure is established based on the complementary energy equivalence principle and Eshelby's equivalent inclusion theory. To analyze the effect of highspeed compression on the meso behavior of frozen soil, according to the Hugoniot energy theory, the evolution of temperature rise in the impact process is formulated. The results for frozen sandy soil confirm that the rate of temperature rise increases with the strain rate and has a significant weakening effect on the bearing capacity. Thus, the damage behavior of frozen soil changes according to different loading histories. Finally, based on the corresponding theoretical results, the mechanical response of frozen soil under different loading histories and the corresponding performance indicators are compared and analyzed.
关键词	CONSTITUTIVE MODEL MICROMECHANICAL MODEL MECHANICAL-BEHAVIOR CONCRETE STRENGTH FRACTURE ENERGY CRACK ROCK SIMULATION
英文关键词	Frozen soil; Impact; Damage mechanics; Temperature variation; Porosity
语种	英语
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000710074900006
来源期刊	MECHANICS OF MATERIALS
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/254560
作者单位	[Fu, Tiantian; Zhu, Zhiwu; Zhang, Fulai] Southwest Jiaotong Univ, Sch Mech & Engn, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu 610031, Sichuan, Peoples R China; [Zhu, Zhiwu; Ma, Wei] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Fu, Tiantian,Zhu, Zhiwu,Ma, Wei,et al. Damage model of unsaturated frozen soil while considering the influence of temperature rise under impact loading[J]. 中国科学院西北生态环境资源研究院,2021,163.
APA	Fu, Tiantian,Zhu, Zhiwu,Ma, Wei,&Zhang, Fulai.(2021).Damage model of unsaturated frozen soil while considering the influence of temperature rise under impact loading.MECHANICS OF MATERIALS,163.
MLA	Fu, Tiantian,et al."Damage model of unsaturated frozen soil while considering the influence of temperature rise under impact loading".MECHANICS OF MATERIALS 163(2021).