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Atomic modeling on the elastic properties of double-walled carbon nanotubes under tension

Yin Jian-Wei Ni Xiang-Gui

Atomic modeling on the elastic properties of double-walled carbon nanotubes under tension

Yin Jian-Wei, Ni Xiang-Gui
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  • Received Date:  06 December 2005
  • Accepted Date:  03 August 2006
  • Published Online:  20 December 2006

Atomic modeling on the elastic properties of double-walled carbon nanotubes under tension

  • 1. (1)中国工程物理研究院研究生部,北京 100088; (2)中国科学技术大学中国科学院材料力学行为和设计重点实验室,合肥 230026

Abstract: The stress versus strain relations and the Poisson's ratios under tension of 4 double-walled carbon nanotubes (DWCNTs) with diameters greater than 1 nm were numerically studied with the molecular dynamics method. The simulation shows that in the elastic range the stress and the strain have nonlinear relation, and the tangent elastic moduli of the DWCNTs decrease from 720 to 570 GPa with increasing strain. As the strain increases, the value of Poisson's ratio changes from 0.3 to 0.17, and the sizes of the DWCNTs have little influences on the Poisson's ratio.

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