Leaky Lamb Waves (LLW) in Multiorientation Composite Laminates

  • Yoseph Bar-Cohen
  • Ajit K. Mal
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series


Considerable efforts have been made in recent years to develop quantitative nondestructive evaluation (NDE) techniques for composite materials, which are being used increasingly in primary structures. The leaky Lamb wave phenomenon has shown considerable potential as an NDE method [1]. Most results reported in this area to date have been concerned with unidirectional laminates [2–4]. This is attributed to the complexity involved in theoretically predicting the response of these materials, as well as to certain difficulties associated with the experimental research. In practice, structural composites are made up of layers in various orientations. Their stacking order is dependent upon the requirements of the particular application. Therefore, the capability of analyzing the behavior of Lamb waves in multiorientation laminates is crucial for the application of LLW to composites.


Dispersion Curve Composite Laminate Lamb Wave Simplex Algorithm Data Inversion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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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 Publishers, Boston, (1987) pp 187–201.Google Scholar
  2. 2.
    A. K. Mal and Y. Bar-Cohen, Stress Waves in Layered Composite Laminates, Proc. 4th Japan-United States Conference on Composite Materials, Washington, DC, June 27–29, 1988.Google Scholar
  3. 3.
    A. H. Nayfeh, T. W. Taylor, and D. E. Chimenti, Theoretical Wave Propagation in Multilayered Orthotropic Media, Proc. of ASME Symp. on Wave Propagation in Structural Composites, A. K. Mal and T. C. T. Ting (Eds.), ASME-AMD, Vol. 90 (1988), pp 17–27.Google Scholar
  4. 4.
    V. Dayal, and V. K. Kinra, Leaky Lamb Waves in an Anisotropic Plate. I: An Exact Solution and Experiments, J. Acoust. Soc. Am. Vol. 85, No. 6 (1989), pp 2268–2276.CrossRefGoogle Scholar
  5. 5.
    M. R. Karim, A.K. Mal, and Y. Bar-Cohen, Inversion of Leaky Lamb Wave Data by Simplex Algorithm, submitted for publication in the J. Acoust. Soc. Am.Google Scholar
  6. 6.
    A. K. Mal, M. R. Karim, and Y. Bar-Cohen, Determination of the Properties of Composite Interfaces by an Ultrasonic Method, submitted by J. Materials Science and Eng.Google Scholar
  7. 7.
    A. K. Mal, Wave Propagation in Layered Composite Laminates Under Periodic Surface Loads, Wave Motion, Vol. 10 (1988), pp 257–266.CrossRefMATHGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Yoseph Bar-Cohen
    • 1
  • Ajit K. Mal
    • 2
  1. 1.Douglas Aircraft CompanyMcDonnell Douglas CorporationLong BeachUSA
  2. 2.Mechanical, Aerospace, and Nuclear EngineeringUniversity of California, Los AngelesLos AngelesUSA

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