Size-Dependent Pull-In Instability of Electrically Actuated Functionally Graded Nano-Beams Under Intermolecular Forces

Research Paper

Abstract

Pull-in instability of a cantilever beam-type nano-actuator made of functionally graded material is investigated using the strain gradient theory under the influence of electrostatic and intermolecular forces. Differential quadrature method is used to solve the nonlinear governing equation of nano-beam; the size effects, different materials and different volume fractions are examined. Results obtained from this model and numerical solution method are in good agreement with the experimental results mentioned in the references. Besides, the results demonstrate that size effect and amount of volume fraction have a substantial effect on the pull-in instability behavior of beam-type nano-actuator.

Keywords

Modified strain gradient theory Intermolecular forces Functionally graded material Size effect 

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Copyright information

© Shiraz University 2016

Authors and Affiliations

  1. 1.Mechanical Engineering DepartmentShahrekord UniversityShahrekordIran
  2. 2.Faculty of EngineeringShahrekord UniversityShahrekordIran

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