Chapter 7. Leaky Plate Waves for NDE of Composites

  1. William Smothers
  1. D. E. Chimenti and
  2. C. J. Fiedler

Published Online: 26 MAR 2008

DOI: 10.1002/9780470320402.ch7

11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 8, Issue 7/8

11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 8, Issue 7/8

How to Cite

Chimenti, D. E. and Fiedler, C. J. (1987) Leaky Plate Waves for NDE of Composites, in 11th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 8, Issue 7/8 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320402.ch7

Author Information

  1. AF Materials Laboratory Wright-Patterson AFB, OH 45433

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1987

ISBN Information

Print ISBN: 9780470374733

Online ISBN: 9780470320402

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Keywords:

  • ultrasonic leaky plate;
  • nondestructive characterization techniques;
  • reflection coefficient;
  • nicalon-BMAS;
  • fiber-matrix interface

Summary

Ultrasonic leaky plate wave propagation in ceramic composite laminates has been investigated using acoustic reflection methods. From ultrasonic measurements on a unidirectional composite plate, experimental velocity dispersion curves for plate wave modes have been constructed. A simple theoretical model has been fitted to the data. The model has been used to estimate some of the unknown constituent elastic constants. Nondestructive characterization techniques, exploiting leaky plate waves in a scanning configuration, are demonstrated. These scans permit the construction of detailed spatial maps of elastic behavior or occurrence of discontinuities in the composite.