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Wind and Structures
  Volume 29, Number 6, December 2019, pages 457-469
DOI: http://dx.doi.org/10.12989/was.2019.29.6.457
 


Aeroelastic analysis of cantilever non-symmetric FG sandwich plates under yawed supersonic flow
Mohammad Hosseini, Ali Ghorbanpour Arani, Mohammad Reza Karamizadeh, Hassan Afshari and Shahriar Niknejad

 
Abstract
    In this paper, a numerical solution is presented for supersonic flutter analysis of cantilever non-symmetric functionally graded (FG) sandwich plates. The plate is considered to be composed of two different functionally graded face sheets and an isotropic homogeneous core made of ceramic. Based on the first order shear deformation theory (FSDT) and linear piston theory, the set of governing equations and boundary conditions are derived. Dimensionless form of the governing equations and boundary conditions are derived and solved numerically using generalized differential quadrature method (GDQM) and critical velocity and flutter frequencies are calculated. For various values of the yaw angle, effect of different parameters like aspect ratio, thickness of the plate, power law indices and thickness of the core on the flutter boundaries are investigated. Numerical examples show that wings and tail fins with larger length and shorter width are more stable in supersonic flights. It is concluded for FG sandwich plates made of Al-Al2O3 that increase in volume fraction of ceramic (Al2O3) increases aeroelastic stability of the plate. Presented study confirms that improvement of aeroelastic behavior and weight of wings and tail fins of aircrafts are not consistent items. It is shown that value of the critical yaw angle depends on aspect ratio of the plate and other parameters including thickness and variation of properties have no considerable effect on it. Results of this paper can be used in design and analysis of wing and tail fin of supersonic airplanes.
 
Key Words
    aeroelasticity; flutter; yawed flow; cantilever plate; sandwich plate
 
Address
Mohammad Hosseini and Mohammad Reza Karamizadeh: Department of Mechanical Engineering, Sirjan University of Technology, 78137-33385 Sirjan, Iran
Ali Ghorbanpour Arani: Faculty of Mechanical Engineering, Department of Solid Mechanics, University of Kashan, Kashan, Iran;
Institute of Nanoscience & Nanotechnology, University of Kashan, Kashan, Iran
Hassan Afshari: Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr/Isfahan, Iran
Shahriar Niknejad: Faculty of Mechanical Engineering, Department of Solid Mechanics, University of Kashan, Kashan, Iran
 

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