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Magneto-electro-elastic vibration analysis of modified couple stress-based three-layered micro rectangular plates exposed to multi-physical fields considering the flexoelectricity effects

  • Khorasani, Mohammad (Department of Mechanical and Aerospace Engineering, Sapienza University) ;
  • Eyvazian, Arameh (Department of Mechanical and Industrial Engineering, Qatar University) ;
  • Karbon, Mohammed (Department of Mechanical and Industrial Engineering, Qatar University) ;
  • Tounsi, Abdelouahed (Department of Civil and Environmental Engineering, King Fahd University of Petroleum & Minerals) ;
  • Lampani, Luca (Department of Mechanical and Aerospace Engineering, Sapienza University) ;
  • Sebaey, Tamer A. (Department of Mechanical Design and Production, Faculty of Engineering, Zagazig University)
  • Received : 2019.12.31
  • Accepted : 2020.04.11
  • Published : 2020.09.25
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Abstract

In this paper, based on the CPT, motion equations for a sandwich plate containing a core and two integrated face-sheets have derived. The structure rests on the Visco-Pasternak foundation, which includes normal and shear modules. The piezo-magnetic core is made of CoFe2O4 and also is subjected to 3D magnetic potential. Two face sheets at top and bottom of the core are under electrical fields. Also, in order to obtain more accuracy, the effect of flexoelectricity has took into account at face sheets' relations in this work. Flexoelectricity is a property of all insulators whereby they polarize when subject to an inhomogeneous deformation. This property plays a crucial role in small-scale rather than macro scale. Employing CPT, Hamilton's principle, flexoelectricity considerations, the governing equations are derived and then solved analytically. By present work a detailed numerical study is obtained based on Piezoelectricity, Flexoelectricity and modified couple stress theories to indicate the significant effect of length scale parameter, shear correction factor, aspect and thickness ratios and boundary conditions on natural frequency of sandwich plates. Also, the figures show that there is an excellent agreement between present study and previous researches. These finding can be used for automotive industries, aircrafts, marine vessels and building industries.

Keywords

References

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