Buckling and post-buckling analysis is presented for axially compressed double-walled carbon nanotubes (CNTs) embedded in an elastic matrix in thermal environments. The double-walled carbon nanotube is modeled as a nonlocal shear deformable cylindrical shell, which contains small scale effects and van der Waals interaction forces. The surrounding elastic medium is modeled as a tensionless Pasternak foundation. The post-buckling analysis is based on a higher order shear deformation shell theory with the von Kármán–Donnell-type of kinematic nonlinearity. The thermal effects are also included and the material properties are assumed to be temperature-dependent and are obtained from molecular dynamics (MD) simulations. The nonlinear prebuckling deformations of the shell and the initial local point defect, which is simulated as a dimple on the tube wall, are both taken into account. A singular perturbation technique is employed to determine the post-buckling response of the tubes and an iterative scheme is developed to obtain numerical results without using any assumption on the shape of the contact region between the tube and the elastic medium. The small scale parameter is estimated by matching the buckling loads of CNTs observed from the MD simulation results with the numerical results obtained from the nonlocal shear deformable shell model. Numerical solutions are presented to show the post-buckling behavior of CNTs surrounded by an elastic medium of conventional and tensionless Pasternak foundations. The results show that buckling and post-buckling behavior of CNTs is very sensitive to the small scale parameter . The results reveal that the unilateral constraint has a significant effect on the post-buckling response of CNTs when the foundation stiffness is sufficiently large.
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July 2010
Research Papers
Nonlocal Shear Deformable Shell Model for Post-Buckling of Axially Compressed Double-Walled Carbon Nanotubes Embedded in an Elastic Matrix
Hui-Shen Shen,
Hui-Shen Shen
Department of Engineering Mechanics,
e-mail: hsshen@mail.sjtu.edu.cn
Shanghai Jiao Tong University
, Shanghai 200030, People’s Republic of China; State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University
, Shanghai 200030, People’s Republic of China
Search for other works by this author on:
Chen-Li Zhang
Chen-Li Zhang
Department of Engineering Mechanics,
Shanghai Jiao Tong University
, Shanghai 200030, People’s Republic of China
Search for other works by this author on:
Hui-Shen Shen
Department of Engineering Mechanics,
Shanghai Jiao Tong University
, Shanghai 200030, People’s Republic of China; State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University
, Shanghai 200030, People’s Republic of Chinae-mail: hsshen@mail.sjtu.edu.cn
Chen-Li Zhang
Department of Engineering Mechanics,
Shanghai Jiao Tong University
, Shanghai 200030, People’s Republic of ChinaJ. Appl. Mech. Jul 2010, 77(4): 041006 (12 pages)
Published Online: April 9, 2010
Article history
Received:
December 13, 2008
Revised:
October 8, 2009
Online:
April 9, 2010
Published:
April 9, 2010
Citation
Shen, H., and Zhang, C. (April 9, 2010). "Nonlocal Shear Deformable Shell Model for Post-Buckling of Axially Compressed Double-Walled Carbon Nanotubes Embedded in an Elastic Matrix." ASME. J. Appl. Mech. July 2010; 77(4): 041006. https://doi.org/10.1115/1.4000910
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