Applied Mathematics and Mechanics (English Edition) ›› 2018, Vol. 39 ›› Issue (2): 219-240.doi: https://doi.org/10.1007/s10483-018-2301-6

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Bending and vibration analyses of a rotating sandwich cylindrical shell considering nanocomposite core and piezoelectric layers subjected to thermal and magnetic fields

M. MOHAMMADIMEHR, R. ROSTAMI   

  1. Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Kashan 87317-53153, Iran
  • Received:2017-04-08 Revised:2017-08-19 Online:2018-02-01 Published:2018-02-01
  • Contact: M. MOHAMMADIMEHR E-mail:mmohammadimehr@kashanu.ac.ir
  • Supported by:
    Project supported by the Iranian Nanotechnology Development Committee (No. 574602/14)

Abstract: The bending and free vibration of a rotating sandwich cylindrical shell are analyzed with the consideration of the nanocomposite core and piezoelectric layers subjected to thermal and magnetic fields by use of the first-order shear deformation theory (FSDT) of shells. The governing equations of motion and the corresponding boundary conditions are established through the variational method and the Maxwell equation. The closed-form solutions of the rotating sandwich cylindrical shell are obtained. The effects of geometrical parameters, volume fractions of carbon nanotubes, applied voltages on the inner and outer piezoelectric layers, and magnetic and thermal fields on the natural frequency, critical angular velocity, and deflection of the sandwich cylindrical shell are investigated. The critical angular velocity of the nanocomposite sandwich cylindrical shell is obtained. The results show that the mechanical properties, e.g., Young's modulus and thermal expansion coefficient, for the carbon nanotube and matrix are functions of temperature, and the magnitude of the critical angular velocity can be adjusted by changing the applied voltage.

Key words: parabolic, multivalued, unilateral constraint. existence of Solution, free vibration, nanocomposite core, rotating sandwich cylindrical shell, bending, piezoelectric layer

2010 MSC Number: 

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