Overview
- Editors:
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Donald O. Thompson
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Center for NDE Ames Laboratory (USDOE) and Department of Aerospace Engineering and Engineering Mechanics, Iowa State University, Ames, USA
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Dale E. Chimenti
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Center for NDE and Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, USA
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About this book
The objective of this study was to increase the understanding of damage in composite materials with through-the-thickness reinforcements. As a first step it was necessary to develop new ultrasonic imaging technology to better assess internal damage of the composite. A useful ultrasonic imaging technique has been successfully developed to assess the internal damage of composite panels. The ultrasonic technique accurately determines the size of the internal damage. It was found that the ultrasonic imaging technique was better able to assess the damage in a composite panel with through-the-thickness reinforcements than by destructively sectioning the specimen and visual inspection under a microscope. Microscopic determination of crack location and lengths in a composite panel with through-the-thickness reinforcements was almost impossible. Five composite compression-after-impact panels were tested. The compression-after-impact strength of the panels with the through-the thickness reinforcements was almost twice that of the comparable panel without through-the-thickness reinforcement. REFERENCES 1. B.T. Smith, J.S. Heyman, A.M. Buoncristiani, Earl D. Blodgett, J.G. Miller, and S.M. Freeman, Correlation of the Deply TechniQue with the Ultrasonic Imaging of Impact Damage in Graphite/Epoxy Composites, Materials Evaluation, vol. 47, NO. 12, December 1989, pp 1408-1416. 2. NASA Tech Briefs, June 1987, p. 28. 3. P.M. Gammel, Improved Ultrasonic Detection using Analytic Signal Magnitude. Ultrasonics, Vol. 19, March 1981, pp 73-76. 4. R.C. Heyser, Determination of Loudspeaker Signal Arrival Times Part ~ Journal of the Audio Engineering Society, Vol. 19, Dec. 1971, pp 902-905.
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Table of contents (147 chapters)
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- B. de Halleux, B. Limburg de Stimm, P. Dumont, R. Van de Wyngaert
Pages 2201-2208
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- Sanjay Bhardwaj, B. T. Khuri-Yakub
Pages 2217-2223
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- Michael J. Avioli Jr., Soung-Nan Liu
Pages 2225-2233
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- A. N. Sinclair, M. Graf, V. daSilva, M. D. C. Moles, M. Doleby, S. Kramer et al.
Pages 2235-2242
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- M. W. Kubovich, J. C. Moulder, M. S. Hughes, B. A. Auld
Pages 2243-2249
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- R. L. Hockey, E. R. Green, A. A. Diaz
Pages 2251-2258
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- Ward D. Rummel, Toru Iura, Vicki E. Panhuise, Donald Pettit, Jack O. Bunting
Pages 2259-2259
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Back Matter
Pages 2271-2307
Editors and Affiliations
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Center for NDE Ames Laboratory (USDOE) and Department of Aerospace Engineering and Engineering Mechanics, Iowa State University, Ames, USA
Donald O. Thompson
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Center for NDE and Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, USA
Dale E. Chimenti