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From:
Ali Lashkari Zadeh (1), Mahmoud Shariati (1) and Hamid Torabi (2)
(1) Department of Mechanical Engineering, Shahrood University of Technology, Daneshgah Blvd, Shahrood, Iran
(2) Young Researchers Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
“Buckling analysis of carbon nanotube bundles under axial compressive, bending and torsional loadings via a structural mechanics model”, Journal of Physics and Chemistry of Solids, Accepted 19 June 2012,
DOI: 10.1016/j.jpcs.2012.06.014
ABSTRACT: A structural mechanics model is employed for the investigation of the buckling behavior of carbonnanotube bundles of three single-walled carbon nanotubes (SWCNTs) under axial compressive, bendingand torsional loadings. The effects of van der Waals (vdW) forces are further modeled using a nonlinearspring element. The effects of different types of boundary conditions are studied for nanotubes with various aspectratios. The results reveal that bundles comprising longer SWCNTs exhibit lower critical buckling load.Moreover, for the fixed-free boundary condition the rate of critical buckling load reduction is highest,while the lowest critical buckling load occurs. Simulations show good agreement between our modeland molecular dynamics results.
Left side: Fig. 6 Critical buckling loads of various aspect ratios of CNT bundles with and without intertube VanderWaals (vdW) interactions.
Right side: The buckling mode shapes of carbon nanotube bundle of (7,7) SWCNT under buckling analysis: (a) fixed-fixed, (b) simple-simple and (c) fixed-free ends.
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