Computational Mechanics, ( ISI ), No (43), Year (2009-3) , Pages (515-524)

Title : Carbon nanotube-reinforced composites: frequency analysis theories based on the matrix stiffness ( Carbon nanotube-reinforced composites: frequency analysis theories based on the matrix stiffness )

Authors: سارا شایان امین , حمید دلیر , Anoshirvan Farshidianfar ,
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Strong and versatile carbon nanotubes are finding new applications in improving conventional polymerbased fibers and films. This paper studies the influence of matrix stiffness and the intertube radial displacements on free vibration of an individual double-walled carbon nanotube (DWNT). For this, a double elastic beam model is presented for frequency analysis in a DWNT embedded in an elastic matrix. The analysis is based on both Euler–Bernoulli and Timoshenko beam theories which considers shear deformation and rotary inertia and for both concentric and non-concentric assumptions considering intertube radial displacements and the related internal degrees of freedom. New intertube resonant frequencies and the associated noncoaxial vibrational modes are calculated. Detailed results are demonstrated for the dependence of resonant frequencies and mode shapes on the matrix stiffness. The results indicate that internal radial displacement and surrounding matrix stiffness could substantially affect resonant frequencies especially for longer double-walled carbon nanotubes of larger innermost radius at higher resonant frequencies, and thus the latter does not keep the otherwise concentric structure at ultrahighfrequencies. Therefore, depending on thematrix stiffness, for carbon nanotubes reinforced composites, different analysis techniques should be used while the aspect ratio of carbon nanotubes has a little effect on the analysis theory which should be selected.

Keywords

Carbon nanotubes · Nanostructures · Mechanical properties modeling · Computational
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@article{paperid:1005727,
author = {سارا شایان امین and حمید دلیر and Farshidianfar, Anoshirvan},
title = {Carbon nanotube-reinforced composites: frequency analysis theories based on the matrix stiffness},
journal = {Computational Mechanics},
year = {2009},
number = {43},
month = {March},
issn = {0178-7675},
pages = {515--524},
numpages = {9},
keywords = {Carbon nanotubes · Nanostructures · Mechanical properties modeling · Computational simulation},
}

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%0 Journal Article
%T Carbon nanotube-reinforced composites: frequency analysis theories based on the matrix stiffness
%A سارا شایان امین
%A حمید دلیر
%A Farshidianfar, Anoshirvan
%J Computational Mechanics
%@ 0178-7675
%D 2009

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