IMECH-IR  > 非线性力学国家重点实验室
Yielding behavior of copper nanowire in the presence of vacancies
Liu XM(刘小明); Yang XB; Wei YG(魏悦广); Liu, XM (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2012-06-01
Volume55Issue:6Pages:1010-1017
ISSN1674-7348
AbstractIn the present research, the measurement fluctuations of mechanical properties in nanowires (NWs) are investigated by using the molecular dynamics simulation. The large numbers of simulations are performed to study the yield behaviors of the NWs. The results have shown that the yield behavior of the smaller diameter NW is more sensitive to the presence of vacancies, and the dispersion of the measured mechanical properties for the small scale NW is larger than that for the large scale NW. Present results have also shown that vacancies escape from the bulk to the free surfaces as a result of high stress applied at the small scale systems similar to the dislocation starvation phenomenon observed in the compression test of nano-pillars, and dislocation nucleation induced by surface defect occurs after the vacancy reaches free surface leading to lower yield strength. Moreover, the strong surface vacancy interactions at the nanoscale level are also investigated.
KeywordNanowire Yield Strength Vacancies Size Effect Molecular-dynamics Mechanical-properties Strain Gradients Metal Nanowires Gold Nanowires Strength Deformation Size Cu Crystals
Subject Area新型材料的力学问题
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000304351900013
DepartmentLNM新型材料及结构的多尺度力学
Classification二类/Q3
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46730
Collection非线性力学国家重点实验室
Corresponding AuthorLiu, XM (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Liu XM,Yang XB,Wei YG,et al. Yielding behavior of copper nanowire in the presence of vacancies[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2012,55(6):1010-1017.
APA 刘小明,Yang XB,Wei YG,&Liu, XM .(2012).Yielding behavior of copper nanowire in the presence of vacancies.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,55(6),1010-1017.
MLA 刘小明,et al."Yielding behavior of copper nanowire in the presence of vacancies".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 55.6(2012):1010-1017.
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