Aeroelastic analysis of CNT reinforced functionally graded laminated composite plates with damage under subsonic regime

2019 ◽  
Vol 222 ◽  
pp. 110916 ◽  
Author(s):  
Prasant Kumar Swain ◽  
Balakrishna Adhikari ◽  
D.K. Maiti ◽  
B.N. Singh
Keyword(s):  
Laminated Composite ◽  
Composite Plates ◽  
Functionally Graded ◽  
Laminated Composite Plates ◽  
Aeroelastic Analysis ◽  
Subsonic Regime

Active Damping of Nonlinear Vibrations of Functionally Graded Laminated Composite Plates using Vertically/Obliquely Reinforced 1-3 Piezoelectric Composite

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Satyajit Panda ◽  
M. C. Ray
Keyword(s):  
Nonlinear Vibrations ◽  
Composite Layer ◽  
Laminated Composite ◽  
Composite Plates ◽  
Functionally Graded ◽  
Fe Model ◽  
Geometrically Nonlinear ◽  
Thickness Direction ◽  
Laminated Composite Plates ◽  
Geometrically Nonlinear Vibrations

This paper deals with a study on the active constrained layer damping (ACLD) of geometrically nonlinear vibrations of functionally graded (FG) laminated composite plates. The constraining layer of the ACLD treatment is considered to be made of the vertically/obliquely reinforced 1-3 piezoelectric composites (PZCs). The substrate FG laminated composite plate is composed of generally orthotropic FG layers. The generally orthotropic FG layer is a fiber reinforced composite layer in which the fibers are longitudinally aligned in the plane parallel to the top and bottom surfaces of the layer and their orientation angle is assumed to vary in the thickness direction according to a simple power-law in order to make it as a graded layer only in the thickness direction. The constrained viscoelastic layer of the ACLD treatment is modeled by implementing the Golla-Hughes-McTavish (GHM) method. Based on the first order shear deformation theory, the finite element (FE) model is developed to model the open-loop and closed-loop nonlinear dynamics of the overall FG laminated composite plates integrated with a patch of such ACLD treatment. The analysis suggests the potential use of the ACLD treatment with its constraining layer made of the vertically/obliquely reinforced 1-3 PZC material for active control of geometrically nonlinear vibrations of FG laminated composite plates. The effect of piezoelectric fiber orientation in the active 1-3 PZC constraining layer on the damping characteristics of the overall FG laminated composite plates is also investigated.

Numerical and statistical buckling analysis of laminated composite plates with functionally graded fiber orientation angles

2020 ◽  
Vol 28 (7) ◽  
pp. 502-512
Author(s):  
Savaş Evran
Keyword(s):  
Fiber Orientation ◽  
Signal To Noise Ratio ◽  
Laminated Composite ◽  
Mesh Size ◽  
Composite Plates ◽  
Buckling Analysis ◽  
Functionally Graded ◽  
Laminated Composite Plates ◽  
Finite Element Software ◽  
Control Factors

The aim of this numerical and statistical study was to investigate the buckling analysis of laminated composite plates containing functionally graded fiber orientation angles. The laminated composite plates had functionally graded fiber orientation angles based on Taguchi’s L18 (21 × 32) orthogonal array. The fiber orientation angles were considered to be control factors. Numerical analyses were performed using finite element software ANSYS. The optimum critical buckling load and the effects of fiber orientation angles for maximum data were determined using the analysis of the signal-to-noise ratio. The importance levels of laminates and their percent contribution on the buckling characteristics were calculated using analysis of variance. Regression analysis was employed to investigate the effects of control factors on buckling responses mathematically. The effects of laminate stacking sequence, mesh size, element type, mode number, and boundary condition were carried out using laminates with the optimum levels.

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