Vol. 8, No. 8-10, 2013

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ISSN: 1559-3959
Analysis of pull-in instability of electrostatically actuated carbon nanotubes using the homotopy perturbation method

Mir Masoud Seyyed Fakhrabadi, Abbas Rastgoo and Mohammad Taghi Ahmadian

Vol. 8 (2013), No. 8-10, 385–401
Abstract
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This paper analyzes the deflection and pull-in behaviors of cantilever and doubly clamped carbon nanotubes (CNTs) under electrostatic actuation using the homotopy perturbation method. The effects of electrostatic force and interatomic interactions on the deflection and pull-in instabilities of CNTs with different lengths, diameters, and boundary conditions are investigated in detail. The results reveal that larger diameters and shorter lengths result in higher pull-in voltages. Moreover, CNTs with doubly clamped boundary conditions, in comparison with cantilever boundary conditions, are more resistant to pull-in.

Keywords
carbon nanotubes, pull-in phenomenon, nanoelectromechanical systems, homotopy perturbation method
Milestones
Received: 8 February 2013
Revised: 20 June 2013
Accepted: 1 October 2013
Published: 30 December 2013
Authors
Mir Masoud Seyyed Fakhrabadi
Karaj Branch
Islamic Azad University
Karaj
Iran
Abbas Rastgoo
School of Mechanical Engineering
College of Engineering
University of Tehran
Tehran
Iran
Mohammad Taghi Ahmadian
Department of Mechanical Engineering
Sharif University of Technology
Tehran 11365-9567
Iran