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Free Vibration of Rectangular Composite Laminates With Delamination

[+] Author Affiliations
L. C. Shiau, S. T. Hwang

National Cheng Kung University, Tainan, Taiwan, R.O.C.

Paper No. IMECE2007-43036, pp. 269-275; 7 pages
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 1: Advances in Aerospace Technology
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4295-9 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME


In this paper, the effect of delamination on natural frequencies and natural modes of a simply supported rectangular symmetric composite plate with through-width delamination was investigated by the finite strip method. The delamination was assumed to be located at mid-plane of the laminate so that the contact/impact phenomenon between delaminated interfaces does not exist for the free vibration of the laminate. A finite strip with bending and in-plane stiffnesses was derived for the free vibration analysis. The effects of delamination length, delamination location, fiber angle, stacking sequence, and aspect ratio of the laminate on the natural frequencies of the laminate were studied and presented. Results show that the above mentioned factors have considerable effect on the natural frequencies of the laminate. The aspect ratio of the plate is also having significant effect on the frequency of the laminates, especially on the mode 2 frequency of the cross-ply laminate.

Copyright © 2007 by ASME



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