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DOI	10.1016/j.jmps.2021.104413
	A unified viscoplastic model and strain rate-temperature equivalence of frozen soil under impact loading
	Zhang, Fulai; Zhu, Zhiwu; Ma, Wei; Zhou, Zhiwei; Fu, Tiantian
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, Sichuan, Peoples R China.
发表日期	2021
ISSN	0022-5096
EISSN	1873-4782
卷号	152
英文摘要	Based on the double-pulse shaping technology, a method for obtaining long rising edge loading pulse by using the structural response of a pulse shaper is proposed. The traditional split Hopkinson pressure bar (SHPB) was improved to be suitable for testing the dynamic mechanical properties of low wave impedance materials. The dynamic mechanical properties of frozen soil at different temperatures and strain rates were tested using the improved SHPB equipment. The increase in the strength of frozen soil was associated with a decrease in temperature and increase in strain rate. The strain rate-temperature equivalence of frozen soil is proposed by regression analysis of the experimental data. The relationship between the temperature and strain rate of frozen soil satisfied the Arrhenius equation and could be explained by the thermal activation mechanism. The thermal softening characteristics of frozen soil caused by the adiabatic heating under impact loading were analyzed, and described by the damage variable driven by the adiabatic heating. The damage dynamic constitutive model is proposed based on the unified viscoplastic theory. The comparison between the model and experimental results indicate the applicability of the model.
关键词	DYNAMIC COMPRESSIVE STRENGTH PULSE SHAPING TECHNIQUES CONSTITUTIVE MODEL BRITTLE MATERIALS PRESSURE DAMAGE TESTS
英文关键词	Frozen soil; Pulse shaping technology; Split Hopkinson pressure bar (SHPB); Thermal activation; Viscoplastic
语种	英语
WOS研究方向	Materials Science ; Mechanics ; Physics
WOS类目	Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
WOS记录号	WOS:000652653900003
来源期刊	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
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/254880
作者单位	[Zhang, Fulai; Zhu, Zhiwu; Fu, Tiantian] Southwest Jiaotong Univ, Sch Mech & Engn, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu, Sichuan, Peoples R China; [Zhu, Zhiwu; Ma, Wei; Zhou, Zhiwei] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Fulai,Zhu, Zhiwu,Ma, Wei,et al. A unified viscoplastic model and strain rate-temperature equivalence of frozen soil under impact loading[J]. 中国科学院西北生态环境资源研究院,2021,152.
APA	Zhang, Fulai,Zhu, Zhiwu,Ma, Wei,Zhou, Zhiwei,&Fu, Tiantian.(2021).A unified viscoplastic model and strain rate-temperature equivalence of frozen soil under impact loading.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,152.
MLA	Zhang, Fulai,et al."A unified viscoplastic model and strain rate-temperature equivalence of frozen soil under impact loading".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 152(2021).