Application of Acousto-Ultrasonics to Quality Control and Damage Assessment of Composites

  • Ramesh Talreja


The paper deals with application of acousto-ultrasonics to two areas of composites engineering: quality control of manufacturing composite components and assessment of damage incurred due to service loads.

The basis of analysis presented is a set of factors, called the stress wave factors (SWFs), proposed earlier by the author. The technique developed to obtain these factors is described and its application is illustrated on two specific examples: 1) quantitative evaluation of the quality of fabrication of ring-shaped, filament-wound specimens of graphite-epoxy and 2) quantitative assessment of the extent of impact damage in a graphite-epoxy laminate.


Stress Wave Stress Wave Propagation Skewness Factor Laminate Stiffness Quantitative Nondestructive Evaluation 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    A. Vary and K. J. Bowles, “Ultrasonic Evaluation of the Strength of Unidirectional Graphite-Polyimide Composites, NASA TM X-73646,” NASA, Cleveland, (1977).Google Scholar
  2. 2.
    A. Vary and K. J. Bowles, An Ultrasonic-Acoustic Technique for Nondestructive Evaluation of Fiber Composite Quality, Poly Eng & Sc. 19:373 (1979).CrossRefGoogle Scholar
  3. 3.
    A. Vary, Concepts and Techniques for Ultrasonic Evaluation of Material Mechanical Properties, in: “Mechanics of Nondestructive Testing,” W. W. Stinchcomb, ed., Plenum Press, New York (1980).Google Scholar
  4. 4.
    A. Vary and R. F. Lark, Correlation of Fiber Composite Tensile Strength with the Ultrasonic Stress Wave Factor, J of Test & Eval. 7:185 (1979).CrossRefGoogle Scholar
  5. 5.
    R. Talreja, A. Govada, and E. G. Henneke, Quantitative Assessment of Damage Growth in Graphite-Epoxy Laminates by Acousto-Ultrasonic Measurements, in: “Review of Progress in Quantitative Nondestructive Evaluation,” D. O. Thompson and D. Chimenti, eds., Plenum Press, New York (1984).Google Scholar
  6. 6.
    R. Talreja, On Fatigue Life Under Stationary Gaussian Random Loads, Eng Frac Mech. 5:993 (1973).CrossRefGoogle Scholar
  7. 7.
    A. L. Highsmith and K. L. Reifsnider, Stiffness-Reduction Mechanisms in Composite Laminates, in: “Damage in Composite Materials, ASTM STP 775,” American Society for Testing and Materials, Philadelphia (1982).Google Scholar
  8. 8.
    R. Talreja, Transverse Cracking and Stiffness Reduction in Composite Laminates, J of Comp Matls. 19:355 (1985).CrossRefGoogle Scholar
  9. 9.
    S. O. Rice, Mathematical Analysis of Random Noise, Bell Systems Technical Journal 23: (1944), Reprinted in: “Selected Papers on Noise and Stochastic Processes,” Dover Publications, New York (1963).Google Scholar

Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • Ramesh Talreja
    • 1
  1. 1.Department of Solid MechanicsThe Technical University of DenmarkLyngbyDenmark

Personalised recommendations