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Ultrasonic stress wave characterization of composite materialsThe work reported covers three simultaneous projects. The first project was concerned with: (1) establishing the sensitivity of the acousto-ultrasonic method for evaluating subtle forms of damage development in cyclically loaded composite materials, (2) establishing the ability of the acousto-ultrasonic method for detecting initial material imperfections that lead to localized damage growth and final specimen failure, and (3) characteristics of the NBS/Proctor sensor/receiver for acousto-ultrasonic evaluation of laminated composite materials. The second project was concerned with examining the nature of the wave propagation that occurs during acoustic-ultrasonic evaluation of composite laminates and demonstrating the role of Lamb or plate wave modes and their utilization for characterizing composite laminates. The third project was concerned with the replacement of contact-type receiving piezotransducers with noncontacting laser-optical sensors for acousto-ultrasonic signal acquisition.
Document ID
19860018193
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Duke, J. C., Jr. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Henneke, E. G., II (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Stinchcomb, W. W. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1986
Publication Information
Publisher: NASA
Subject Category
Quality Assurance And Reliability
Report/Patent Number
NASA-CR-3976
E-2948
NAS 1.26:3976
Accession Number
86N27665
Funding Number(s)
PROJECT: RTOP 506-53-1A
CONTRACT_GRANT: NAG3-323
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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