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On the Nanoindentation of the Carbon Nanotubes

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Author(s): Petre P. Teodorescu | Veturia Chiroiu | Ligia Munteanu | Valeria Moşneguţu

Journal: Analele Universităţii Eftimie Murgu Reşiţa. Fascicula de Inginerie
ISSN 1453-7397

Volume: XVII;
Issue: 1;
Start page: 45;
Date: 2010;
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Keywords: nanoindentation | carbon nanotubes | buckling | Brenner-Tersoff potential | van der Waals force | kink

ABSTRACT
A new inverse approach is proposed in this paper, which combines elements of nonlocal theory and molecular mechanics, based on the experimental results available in the nanoindentation literature. The effect of the inlayer van der Waals atomistic interactions for carbon nanotubes with multiple walls (MWCNT) is included by means of the Brenner-Tersoff potential and experimental results. The neighboring walls of MWCNT are coupled through van der Waals interactions, and the shell buckling would initiate in the outermost shell, when nanotubes are short. The nanoindentation technique is simulated for the axially compressed of individual nanotubes, in order to evaluate the load-unloaded-displacement, the curve critical buckling and the appropriate values for local Lamé constants.
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