Critical strain of carbon nanotubes: An atomic-scale finite element study
Author(s)
Author(s)
Guo, X.
Jiang, H.
He, X. Q.
Huang, Y.
Date Issued
2007
Publisher
The American Society of Mechanical Engineers
Journal
Journal of Applied Mechanics
Volume
74
Issue
2
Start page
347
End page
351
Abstract
This paper employs the atomic-scale finite element method (AFEM) to study critical strain of axial buckling for carbon nanotubes (CNTs). Brenner et al. “second-generation” empirical potential is used to model covalent bonds among atoms. The computed energy curve and critical strain for (8, 0) single-walled CNT (SWNT) agree well with molecular dynamics simulations. Both local and global buckling are achieved, two corresponding buckling zones are obtained, and the global buckling behavior of SWNT with a larger aspect ratio approaches gradually to that of a column described by Euler’s formula. For double-walled CNTs with smaller ratio of length to outer diameter, the local buckling behavior can be explained by conventional shell theory very well. AFEM is an efficient way to study buckling of CNTs.
SFU Affiliated Publication
No
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