Compressive Instability of Carbon Nanotubes

Abstract:

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Based on both molecular mechanics and computational structural mechanics, a three-dimensional (3D) equivalent beam element is developed to model a C-C covalent bond on carbon nanotubes (CNTs) whereas the van der Waals forces between atoms in the different walls of multi-walled CNTs are described using a rod element. The buckling characteristics of CNTs are conveniently analyzed by using the traditional finite element method (FEM) of a 3D beam and rod model, termed as molecular structural mechanics approach (MSMA). Moreover, to model the CNTs with large length or large diameter, the validity of Euler’s beam buckling theory and a shell model with proper properties defined from the results of MSMA is investigated. The predicted results by this simple continuum mechanics approach agree well with the reported experimental data.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

2187-2190

DOI:

10.4028/www.scientific.net/KEM.353-358.2187

Citation:

N. Hu et al., "Compressive Instability of Carbon Nanotubes", Key Engineering Materials, Vols. 353-358, pp. 2187-2190, 2007

Online since:

September 2007

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Price:

$35.00

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