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Structural Engineering and Mechanics
  Volume 31, Number 5, March 30 2009 , pages 587-603

Free vibration of laminated composite skew plates with central cutouts
Sang-Youl Lee and Taehyo Park

    We performed a free vibration analysis of skew composite laminates with or without cutout based on the high-order shear deformation plate theory (HSDT). The effects of skew angles and ply orientations on the natural frequencies for various boundary conditions are studied using a nonlinear highorder finite element program developed for this study. The numerical results are in good agreement with those reported by other investigators for simple test cases, and the new results reported in this paper show the interactions between the skew angle, layup sequence and cutout size on the free vibration of the laminate. The findings highlight the importance of skew angles when analyzing laminated composite skew plates with cutout or without cutout.
Key Words
    composite laminates; skew plates; finite element analysis; high-order shear deformation plate theory; free vibration; skew angles; cutout ratios.
Sang-Youl Lee: Industry-Academy Cooperative Foundation, Joongbu University, 101 Daehak-ro, Chungnam 312-702, Korea
Taehyo Park: Department of Civil Engineering, Hanyang University, 17 Haengdang, Seoul 133-791, Korea

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