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Ultrasonic Characterization of Defects and Damage in Thick Composites

  • Isaac M. Daniel
  • Shi-Chang Wooh
Chapter
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series

Abstract

The fabrication and use of composites in thick sections create special needs for flaw detection and characterization which cannot be met by conventional nondestructive evaluation (NDE). Thick composite sections are susceptible to a variety of fabrication defects and in-service damage. Typical fabrication defects include matrix cracking, porosity, delaminations, fiber misalignment and waviness, fiber fractures, and nonuniform matrix distribution (fiber volume ratio). A consequence of fabrication defects is the variation of mechanical properties through the thickness and the buildup of residual stresses. In-service defects result from environmental factors, such as thermal gradients, and mechanical loading, such as impact.

Keywords

Ultrasonic Beam Quantitative Nondestructive Evaluation Fiber Misalignment Zinc Iodide Thick Composite 
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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References

  1. 1.
    I. M. Daniel, S. C. Wooh, and J. W. Lee, “Defect and Damage Characterization in Composite Materials,” Review of Progress in Quantitative Nondestructive Evaluation, Vol. 6B, ed. by Donald O. Thompson and Dale E. Chimenti, Plenum Publishing Corp., 1987, pp. 1195–1202.Google Scholar
  2. 2.
    I. M. Daniel and S. C. Wooh, “Ultrasonic Techniques for Characterization of Manufacturing Defects in Thick Composites,” Review of Progress in Quantitative Nondestructive Evaluation, Vol. 8B, ed. by Donald O. Thompson and Dale E. Chimenti, Plenum Publishing Corp., 1989, pp. 1605–1612.Google Scholar
  3. 3.
    S. C. Wooh and I. M. Daniel, “Enhancement Techniques for Nondestructive Evaluation of Composites,” ASME Journal of Engineering Materials and Technology, October, 1989.Google Scholar
  4. 4.
    S. C. Wooh and I. M. Daniel, “Three-Dimensional Imaging of Impact Damage in Composite Laminates,” Review of Progress in Quantitative Nondestructive Evaluation, Vol. 9, ed. by Donald O. Thompson and Dale E. Chimenti, Plenum Publishing Corp., 1990.Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Isaac M. Daniel
    • 1
  • Shi-Chang Wooh
    • 1
  1. 1.The Robert R. McCormick School of Engineering and Applied ScienceNorthwestern UniversityEvanstonUSA

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