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Torsional buckling of a DWCNT embedded on winkler and pasternak foundations using nonlocal theory

Journal of mechanical science and technology v.24 no.6 , 2010년, pp.1289 - 1299  
Mohammadimehr, M. (Department of Mechanical Engineering, Shahid Bahonar University of Kerman ) ;  Saidi, A.R. ( Department of Mechanical Engineering, Shahid Bahonar University of Kerman ) ;  Arani, A. Ghorbanpour ( Department of Mechanical Engineering, Faculty of Engineering, University of Kashan ) ;  Arefmanesh, A. ( Department of Mechanical Engineering, Faculty of Engineering, University of Kashan ) ;  Han, Q. ( College of Civil Engineering and Transportation, South China University of Technology)
Abstract

The small-scale effect on the torsional buckling of a double-walled carbon nanotube (DWCNT) embedded on Winkler and Pasternak foundations is investigated in this study using the theory of nonlocal elasticity. The effects of the surrounding elastic medium, such as the spring constant of the Winkler type and the shear constant of the Pasternak type, as well as the van der Waals (vdW) forces between the inner and the outer nanotubes are taken into account. Finally, based on the theory of nonlocal elasticity and by employing the continuum models, an elastic double-shell model is presented for the nonlocal torsional buckling load of a DWCNT. It is seen from the results that the shear constant of the Pasternak type increases the nonlocal critical torsional buckling load, while the difference between the presence and the absence of the shear constant of the Pasternak type becomes large. It is shown that the nonlocal critical buckling load is lower than the local critical buckling load. Moreover, a simplified analysis is carried out to estimate the nonlocal critical torque for the torsional buckling of a DWCNT.

주제어

#DWCNT   #Small scale effect   #Torsional buckling   #VdW force   #Winkler and Pasternak foundations  

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이 논문을 인용한 문헌 (4)

  1. 2011. "" Journal of mechanical science and technology, 25(9): 2365~2375 
  2. 2011. "" Journal of mechanical science and technology, 25(9): 2385~2391 
  3. 2012. "" Journal of mechanical science and technology, 26(11): 3389~3397 
  4. 2012. "" Journal of mechanical science and technology, 26(5): 1455~1462 

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