Finite element modeling of van der waals interaction for elastic stability of multi-walled carbon nanotubes

Conference proceedings article

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Publication Details

Author list: Thongyothee C., Chucheepsakul S.

Publisher: Trans Tech Publications

Publication year: 2008

Volume number: 55-57

Start page: 525

End page: 528

Number of pages: 4

ISBN: 9780878493562

ISSN: 1022-6680

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-62949232061&partnerID=40&md5=0e02898f0d955ca1a7629512af108987

Languages: English-Great Britain (EN-GB)

Abstract

The purpose of this study is to assess the effect of van der Waals interactions within multi-walled carbon nanotubes with the three dimensional finite element models. The elastic buckling behaviors of nanotubes are treated under axial compressive force acting on open both ends of nanotubes and considered with various boundary conditions. The analysis is based on the assumptions that the covalent bond of each wall is represented by an elastic beam element while the van der Waals force of adjacent walls are represented by a nonlinear truss element following the Lennard-Jones "6-12" theory. The models of double-walled carbon nanotubes are used to explain the characteristic of multi-walled carbon nanotubes and then results compared with the column theory. The results show that the critical load of nanotubes depends on atomic arrangement, tube length, and number of walls, while the van der Waals force has a small effect on the buckling load for multi-walled carbon nanotubes. ฉ 2008 Trans Tech Publications, Switzerland.

Keywords

Buckling behavior, Critical load, Finite Element modeling, Van dar Waals interaction