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International Journal for Multiscale Computational Engineering
Factor de Impacto: 1.016 Factor de Impacto de 5 años: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN Imprimir: 1543-1649
ISSN En Línea: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v7.i3.40
pages 205-215

Deformation and Stability of Copper Nanowires under Bending

Yonggang Zheng
State Key Laboratory of Structure Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024
Hongwu Zhang
Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, P. R. China
Zhen Chen
Department of Civil & Environmental Engineering, University of Missouri, USA; Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, P. R. China
Shan Jiang
State Key Laboratory of Structure Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, China

SINOPSIS

Using molecular dynamics simulations and the embedded-atom method, the bending deformation and stability of copper nanowires are investigated in this article. It is found that the plastic deformation is mainly accommodated by the propagation of and the interaction between partial dislocations nucleated from surfaces, with twinning being a very common deformation mode. Simulation results also show that the copper nanowires exhibit a decrease of resistance against plastic deformation and tend to become homogeneous with the increase of the length, while the resistance increases with the increase of the thickness under bending. These results are consistent with those from the instability analysis based on the local Hessian matrix and suggest that the structure identification method based on the Voronoi construction can be used as a reasonable criterion for instability analysis. In addition, it is also found that two- and three-conjoint fivefold deformation twins can be formed in the quasi one-dimensional nanostructures due to the abundance of partial dislocations, stacking faults, and twins.

REFERENCIAS

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  3. Seryogin, G., Shalish, H., Moberlychan, W., and Narayanamurti, V., Catlytic hydride vapor phase epitaxy growth of GaN nanowires. DOI: 10.1088/0957-4484/16/10/058

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