Abstract
Influences of different factors on the torsion properties of single crystal copper nanowire are studied by molecular dynamics method. The length, torsional rate, and temperature of the nanowire are discussed at the elastic-plastic critical point. According to the average potential energy curve and shear stress curve, the elastic-plastic critical angle is determined. Also, the dislocation at elastoplastic critical points is analyzed. The simulation results show that the single crystal copper nanowire can be strengthened by lengthening the model, decreasing the torsional rate, and lowering the temperature. Moreover, atoms move violently and dislocation is more likely to occur with a higher temperature. This work mainly describes the mechanical behavior of the model under different states.
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Funding
This was supported by National Key R&D Program of China (No. 2017YFC1500801), Earthquake Administration and the Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration (Grant No. 2017QJGJ06) and the program for Innovative Research Team in China.
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Yang, Y., Li, Y., Yang, Z. et al. Molecular dynamics simulation on the elastoplastic properties of copper nanowire under torsion. J Nanopart Res 20, 49 (2018). https://doi.org/10.1007/s11051-018-4155-0
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DOI: https://doi.org/10.1007/s11051-018-4155-0