Buckling of single-walled carbon nanotubes upon bending : Molecular dynamics simulations and finite element method

Guoxin CAO*, Xi CHEN

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

162 Citations (Scopus)

Abstract

The bending buckling behaviors of single-walled carbon nanotubes (SWCNTs) are systematically investigated by using both molecular dynamics (MD) simulation and finite element method (FEM), to analyze the relationships between critical bending buckling curvature, critical buckling strain and nanotube geometry parameters (e.g., tube diameter, length and chirality). The postbuckling shape of SWCNT and the effect of loading boundary conditions are also discussed. The comparison between MD and FEM simulations shows that the continuum shell model provides some useful insights into the bending buckling mechanisms, yet it cannot quantitatively reproduce the bending buckling behavior of SWCNTs, since the continuum model does not account for the geometrical imperfections in the atomic system that are critical to the onset of buckling. Improvements of continuum models are suggested based on the findings.

Original languageEnglish
Article number155435
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number15
DOIs
Publication statusPublished - 27 Apr 2006
Externally publishedYes

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