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Structural Engineering and Mechanics Volume 64, Number 3, November10 2017 , pages 329-337 DOI: https://doi.org/10.12989/sem.2017.64.3.239 |
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Finite element modeling of the vibrational behavior of multi-walled nested silicon-carbide and carbon nanotubes |
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Abed Nikkar, Saeed Rouhi and Reza Ansari
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| Abstract | ||
| This study concerns the vibrational behavior of multi-walled nested silicon-carbide and carbon nanotubes using the finite element method. The beam elements are used to model the carbon-carbon and silicon-carbon bonds. Besides, spring elements are employed to simulate the van der Waals interactions between walls. The effects of nanotube arrangement, number of walls, geometrical parameters and boundary conditions on the frequencies of nested silicon-carbide and carbon nanotubes are investigated. It is shown that the double-walled nanotubes have larger frequencies than triple-walled nanotubes. Besides, replacing silicon carbide layers with carbon layers leads to increasing the frequencies of nested silicon-carbide and carbon nanotubes. Comparing the first ten mode shapes of nested nanotubes, it is observed that the mode shapes of armchair and zigzag nanotubes are almost the same. | ||
| Key Words | ||
| dynamic analysis; finite element method; numerical methods; size effect; nanostructures/nanotubes | ||
| Address | ||
| Abed Nikkar and Reza Ansari : Department of Mechanical Engineering, University of Guilan, P.O. Box 3756, Rasht, Iran Saeed Rouhi : Young Researchers and Elite Club, Langarud Branch, Islamic Azad University,Langarud , Guilan, Iran | ||