Atomistic study of shock Hugoniot in columnar nanocrystalline copper

doi:10.1016/j.commatsci.2021.110635

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Atomistic study of shock Hugoniot in columnar nanocrystalline copper
	Hu JQ(胡剑桥)2,3; Chen, Zhen 1
刊名	COMPUTATIONAL MATERIALS SCIENCE
	2021-09-01
卷号	197 页码:8
关键词	Shock Hugoniot Molecular dynamics Columnar nanocrystal Size effect Shielding effect
ISSN号	0927-0256
DOI	10.1016/j.commatsci.2021.110635
通讯作者	Hu, Jianqiao(jianqiaohu@imech.ac.cn)
英文摘要	Understanding the shock behavior of polycrystals is challenging due to the effects of grain size, defect, and orientation. In this study, we focus on the grain size and defect effects on the shock Hugoniot of polycrystals using columnar nanocrystalline copper. The dominant deformation mechanism is clarified under the impact velocities ranging from 300 m/s to 1200 m/s. The main findings from this study are as follows. The shock Hugoniot relation between pressure and specific volume has no clear dependence on the grain size, whereas the corresponding Hugoniot shear stress exhibits a grain size dependence. The primary defects of shock plasticity change from dislocation to stacking fault and finally twinning with the increase of impact velocity. As the impact velocity exceeds 1000 m/s, the shielding effect becomes prominent as a result of the defect formation on the parallel slip planes within a grain.
分类号	Q3
资助项目	National Natural Science Foundation of China[11802310] ; Science Challenge Project[TZ2018001]
WOS关键词	MOLECULAR-DYNAMICS SIMULATIONS ; DISLOCATION NUCLEATION ; MONOCRYSTALLINE COPPER ; INDUCED DEFORMATION ; STRAIN-RATE ; COMPRESSION ; PLASTICITY ; STRENGTH ; ORIENTATION ; TEMPERATURE
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000681081900004
资助机构	National Natural Science Foundation of China ; Science Challenge Project
其他责任者	Hu, Jianqiao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87173]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Missouri, Coll Engn, Columbia, MO 65211 USA 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Hu JQ,Chen, Zhen. Atomistic study of shock Hugoniot in columnar nanocrystalline copper[J]. COMPUTATIONAL MATERIALS SCIENCE,2021,197:8.
APA	胡剑桥,&Chen, Zhen.(2021).Atomistic study of shock Hugoniot in columnar nanocrystalline copper.COMPUTATIONAL MATERIALS SCIENCE,197,8.
MLA	胡剑桥,et al."Atomistic study of shock Hugoniot in columnar nanocrystalline copper".COMPUTATIONAL MATERIALS SCIENCE 197(2021):8.