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Buckling behavior of perfect and defective DWCNTs under axial, bending and torsional loadings via a structural mechanics approach |
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| Authors: | Hamid Torabi Mahmoud Shariati Elahehsadat Sedaghat Ali Lashkari Zadeh |
| Institution: | 1. Young Researchers Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran 2. Department of Mechanical Engineering, Shahrood University of Technology, Daneshgah Blvd, Shahrood, Iran 3. Department of Mechanical Engineering, Ferdowsi University, Mashhad, Iran |
| Abstract: | The buckling behavior of perfect and defective double-walled carbon nanotubes (DWCNTs) under axial compressive, torsional and bending loadings is investigated using a structural mechanics model. The effects of van der Waals (vdW) forces are further modeled using a nonlinear spring element. Critical buckling loads, critical buckling moments and the effects of vacancy defects were studied for armchair nanotubes with various aspect ratios. The results show that vacancy defects greatly reduce the critical buckling load of DWCNTs. The density of defects plays an important role in buckling of DWCNTs. The results of this numerical model are in good agreement with their comparable existing works. |
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