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Coupled Systems Mechanics
  Volume 2, Number 3, September 2013 , pages 215-230
DOI: https://doi.org/10.12989/csm.2013.2.3.215
 

Pull-in instability of electrically actuated poly-SiGe graded Micro-beams
Xiao L. Jia, Shi M. Zhang, Jie Yang and Sritawat Kitipornchai

 
Abstract
    This paper investigates the pull-in instability of functionally graded poly-SiGe micro-beams under the combined electrostatic and intermolecular forces and temperature change. The exponential distribution model and Voigt model are used to analyze the functionally graded materials (FGMs). Principle of virtual work is used to derive the nonlinear governing differential equation which is then solved using differential quadrature method (DQM). A parametric study is conducted to show the significant effects of material composition, geometric nonlinearity, temperature change and intermolecular Casimir force.
 
Key Words
    functionally graded materials; micro-beam;pull-in instability;temperature change;Casimir force
 
Address
Xiao L. Jia and Shi M. Zhang: PetroleumCollege of Mechanical and Transportation Engineering, China University Petroleum-Beijing, 18 Fuxue Road, Changping, Beijing, CO 102249, China
Jie Yang: School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, PO Box 71, Bundoora, VIC 3083 Australia
Sritawat Kitipornchai: School of Civil Engineering, The University of Queensland, Brisbane, St Lucia 4072, Australia
 

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