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TECHNICAL PAPERS

Free Flexural Vibrations of Orthotropic Composite Base Plates or Panels With a Bonded Noncentral (or Eccentric) Stiffening Plate Strip

[+] Author and Article Information
U. Yuceoglu, V. Özerciyes

Department of Aeronautical Engineering, Middle East Technical University, Ankara 06531, Turkey

J. Vib. Acoust 125(2), 228-243 (Apr 01, 2003) (16 pages) doi:10.1115/1.1553975 History: Received April 01, 2001; Revised October 01, 2002; Online April 01, 2003
Copyright © 2003 by ASME
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References

Figures

Grahic Jump Location
General configuration and coordinate system of orthotropic, composite plate or panel with a noncentral (or eccentric) stiffening plate strip
Grahic Jump Location
Longitudinal cross-section and coordinate system of orthotropic, composite plate or panel with a noncentral (or eccentric) stiffening plate strip
Grahic Jump Location
Mode shapes and natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (“hard” adhesive, joint length b1=0.30 m.,b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFCC)
Grahic Jump Location
Mode shapes and natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (“soft” adhesive, joint length b1=0.30 m.,b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFCC)
Grahic Jump Location
Mode shapes and natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (“hard” adhesive, joint length b1=0.30 m.,b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFFF)
Grahic Jump Location
Mode shapes and natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (“soft” adhesive, joint length b1=0.30 m.,b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFFF)
Grahic Jump Location
Mode shapes and natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (“hard” adhesive, joint length b1=0.30 m.,b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFSS)
Grahic Jump Location
Mode shapes and natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (“hard” adhesive, joint length b1=0.30 m.,b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFFC)
Grahic Jump Location
Effect of “joint length ratio b1/b2” on natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (base plate length b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFCC)
Grahic Jump Location
Effect of “joint length ratio b1/b2” on natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (base plate length b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFFF)
Grahic Jump Location
Effect of “joint length ratio b1/b2” on natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (base plate length b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFSS)
Grahic Jump Location
Effect of “joint length ratio b1/b2” on natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (base plate length b2=1.00 m.,a=0.50 m.) (boundary conditions in y-direction FFFC)
Grahic Jump Location
Effect of “stiffener position ratio b̃/b2” on natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=kevlar-epoxy) (joint length b1=0.20 m.,b2=1.00 m.,a=0.5 m.) (boundary conditions in y-direction FFCC)
Grahic Jump Location
Influence of “dimensionless adhesive elastic modulus Ea/B11(1)” and “dimensionless adhesive shear modulus Ga/B11(1)” on natural frequencies of orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=graphite-epoxy) (joint length b1=0.30 m.,b2=1.00 m.,a=0.5 m.) (several boundary conditions in y-direction)
Grahic Jump Location
Natural frequencies versus “bending rigidity ratio D11(2)/D11(1)” in orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=D11(2) changes) (joint length b1=0.30 m.,b2=1.00 m.,a=0.5 m.) (several boundary conditions in y-direction)
Grahic Jump Location
Natural frequencies versus “bending rigidity ratio D11(2)/D11(1)” in orthotropic, composite plate or panel with a noncentral stiffening plate strip (Plate 1=graphite-epoxy, Plate 2=D11(2) changes) (joint length b1=0.30 m.,b2=1.00 m.,a=0.5 m.) (several boundary conditions in y-direction)

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