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Evaluation of Sensitivity of Ultrasonic Detection of Delaminations in Graphite/Epoxy Laminates

Schramm, S. W. / Daniel, I. M. / Hamilton, W. G.

Abstract A study was conducted to evaluate, improve and optimize ultrasonic techniques for the detection of tight delaminations in composite laminates. Four graphite/epoxy panels were investigated using matched pairs of compression and shear wave ultrasonic transducers of three frequencies (1, 2.25 and 5MHz). Pulse echo and through transmission modes were used and A-scans, C-scans and frequency spectra were analyzed. It was found that the higher frequency (5MHz) compression transducer operated in the pulse-echo mode gave the best results in most cases. Shear wave transducers were found to be cumbersome to use and unsuitable for the cases studied.

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Evaluation of Sensitivity of Ultrasonic Detection of Delaminations in Graphite/Epoxy Laminates

Schramm, S. W. / Daniel, I. M. / Hamilton, W. G.

Abstract A study was conducted to evaluate, improve and optimize ultrasonic techniques for the detection of tight delaminations in composite laminates. Four graphite/epoxy panels were investigated using matched pairs of compression and shear wave ultrasonic transducers of three frequencies (1, 2.25 and 5MHz). Pulse echo and through transmission modes were used and A-scans, C-scans and frequency spectra were analyzed. It was found that the higher frequency (5MHz) compression transducer operated in the pulse-echo mode gave the best results in most cases. Shear wave transducers were found to be cumbersome to use and unsuitable for the cases studied.

Evaluation of Sensitivity of Ultrasonic Detection of Delaminations in Graphite/Epoxy Laminates

Schramm, S. W. / Daniel, I. M. / Hamilton, W. G.

Abstract A study was conducted to evaluate, improve and optimize ultrasonic techniques for the detection of tight delaminations in composite laminates. Four graphite/epoxy panels were investigated using matched pairs of compression and shear wave ultrasonic transducers of three frequencies (1, 2.25 and 5MHz). Pulse echo and through transmission modes were used and A-scans, C-scans and frequency spectra were analyzed. It was found that the higher frequency (5MHz) compression transducer operated in the pulse-echo mode gave the best results in most cases. Shear wave transducers were found to be cumbersome to use and unsuitable for the cases studied.

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Title:

Evaluation of Sensitivity of Ultrasonic Detection of Delaminations in Graphite/Epoxy Laminates

Contributors:

Schramm, S. W. (author) / Daniel, I. M. (author) / Hamilton, W. G. (author)

Published in:

Mechanics of Nondestructive Testing ; 309-324

Publication date:

1980-01-01

Size:

16 pages

ISBN:

978-1-4684-3859-8 , 978-1-4684-3857-4

DOI:

https://doi.org/10.1007/978-1-4684-3857-4_15

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Composite Laminate , Compressive Wave , Ultrasonic Transducer , Specimen Type , Ultrasonic Inspection Engineering , Nanotechnology and Microengineering , Characterization and Evaluation of Materials , Materials Science, general

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