Abstract
The instability of large diameter single-walled carbon nanotubes (SWCNTs) conveying fluid is investigated based on the molecular mechanics. Using the modal expansion for structural displacements, the governing equations of coupled fluid-structural dynamics of SWCNTs are derived. The natural frequencies and mode shape of the SWCNTs are obtained based on the molecular structural mechanics to account for the effect of chirality and discrete nature of SWCNTs. The results show that the vibrational behavior of large diameter SWCNTs conveying fluid is size dependent, but the effect of chirality is negligible. The obtained results are compared with the equivalent continuum-based model in the literature and in some cases remarkable deviations between the results are observed. Accordingly, proper values for the equivalent wall thickness and Young’s modulus of SWCNTs are proposed to adopt the results of continuum-based model with the molecular mechanics predictions.
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Hossein Ramezani Ali-Akbari received his B.Sc. in Aerospace Engineering from Malek-e-Ashtar University of Technology in Isfahan, Iran, in 2008. He then received his M.Sc. in Aerospace Engineering from Sharif University of Technology in Tehran, Iran, in 2011. His research interests are nanomechanics, fluid-solid interaction (FSI), aeroelasticity and structural dynamics.
Roohollah Dehghani Firouz-Abadi is an assistant professor in the Department of Aerospace Engineering of Sharif University of Technology in Iran-Tehran from 2008. He received his B.Sc. (in 2003), M.Sc. (in 2005) and Ph.D (in 2008) in Aerospace Engineering from Sharif University of Technology. His research interests are nano- mechanics, fluid and solid interaction, structural dynamics and control, liquid sloshing dynamics and boundary elements methods.
Hassan Haddadpour received his B.Sc. in Mechanical Engineering in 1993 from Abadan Institute of Technology in Iran. He also graduated from the M.Sc. program and Ph.D for Mechanical Engineering in the applied design course from University of Tehran. He joined Sharif University of Technology in 2002. Currently, he is a professor in the Department of Aerospace Engineering of Sharif University of Technology. His research interests are aeroelasticity, reduced order modeling and structural dynamics.
Mohammadali Noorian is a Ph.D. candidate for Aerospace Engineering in the Department of Aerospace Engineering of Sharif University of Technology in Iran- Tehran. He received his B.Sc. (in 2007) and M.Sc. (in 2009) in Aerospace Engineering from Sharif University of Technology. His research interests are in fluid and solid interaction, reduced order modeling, liquid sloshing dynamics, boundary element methods and aeroelasticity.
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Ali-Akbari, H.R., Firouz-Abadi, R.D., Haddadpour, H. et al. Shell-like instability of large diameter single-walled carbon nanotubes conveying fluid. J Mech Sci Technol 26, 3389–3397 (2012). https://doi.org/10.1007/s12206-012-0859-8
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DOI: https://doi.org/10.1007/s12206-012-0859-8