Ultrasonic NDE of Thick Composite Laminates

  • Ajit K. Mal
  • Yoseph Bar-Cohen


The feasibility of using relatively low frequency leaky Lamb waves (LLW) for the quantitative characterization of thick composites is discussed. A coordinated theoretical and experimental program of research has been carried out in an effort to understand the behavior of the leaky wavefield produced by thick composite laminates. Good correlation between theoretical predictions of the LLW spectra and laboratory measurements has been achieved for the specimens. The need for further research to develop a full or understanding is indicated.


Lamb Wave Multilayered Plate Homogeneous Plate Resin Pocket Thick Laminate 
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  1. 1.
    Y. Bar-Cohen, “Ultrasonic NDE of Composites — A Review,” Solid Mechanics Research for Quantitative NDE, J.D. Achenbach, and Y. Rajapakse, eds., Martinus Nijhoff, Boston, pp. 187–201, 1987.Google Scholar
  2. 2.
    A.K. Mal and Y. Bar-Cohen, “Ultrasonic Characterization of Composite Laminates,” Proc. Symp. on Wave Propagation in Structural Composites, Berkeley, CA, June 20–22, 1988, A.K. Mal and T.C.T. Ting, eds., AMD-Vol. 90, pp. 1–16, 1988.Google Scholar

Copyright information

© Springer Science+Business Media New York 1989

Authors and Affiliations

  • Ajit K. Mal
    • 1
  • Yoseph Bar-Cohen
    • 2
  1. 1.Mechanical, Aerospace and Nuclear EngineeringUniversity of CaliforniaLos AngelesCaliforniaUSA
  2. 2.Douglas Aircraft CompanyMcDonnell Douglas CorporationLong BeachCaliforniaUSA

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