Structural Engineering and Mechanics

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Frequency and instability responses in nanocomposite plate assuming different distribution of CNTs

  • Farokhian, Ahmad (Mechanical Engineering group, Pardis College, Isfahan University of Technology) ;
  • Kolahchi, Reza (Institute of Research and Development, Duy Tan University)
  • Received : 2019.06.22
  • Accepted : 2019.10.19
  • Published : 2020.03.10
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Abstract

The objective of present paper is assessment of dynamic buckling behavior of an embedded sandwich microplates in thermal environment in which the layers are reinforced through functionally graded carbon nanotubes (FG-CNTs). Therefore, mixture rule is taken into consideration for obtaining effective material characteristics. In order to model this structure much more realistic, Kelvin-Voigt model is presumed and the sandwich structure is rested on visco-Pasternak medium. Exponential shear deformation theory (ESDT) in addition to Eringen's nonlocal theory are utilized to obtain motion equations. Further, differential cubature method (DCM) as well as Bolotin's procedure are used to solve governing equations and achieve dynamic instability region (DIR) related to sandwich structure. Different parameters focusing on volume percent of CNTs, dispersion kinds of CNTs, thermal environment, small scale effect and structural damping and their influences upon the dynamic behavior of sandwich structure are investigated. So as to indicate the accuracy of applied theories as well as methods, the results are collated with another paper. According to results, presence of CNTs and their dispersion kind can alter system's dynamic response as well.

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References

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