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Extensional and flexural waves in a thin-walled graphite/epoxy tubeSimulated acoustic emission signals were induced in a thin-walled graphite/epoxy tube by means of lead breaks (Hsu-Nielsen source). The tube is of similar material and layup to be used by NASA in fabricating the struts of Space Station Freedom. The resulting waveforms were detected by broad band ultrasonic transducers and digitized. Measurements of the velocities of the extensional and flexural modes were made for propagation directions along the tube axis (0 degrees), around the tube circumference (90 degrees) and at an angle of 45 degrees. These velocities were found to be in agreement with classical plate theory.
Document ID
19930027574
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Prosser, William H.
(NASA Langley Research Center Hampton, VA, United States)
Dorighi, John
(NASA Langley Research Center Hampton, VA, United States)
Gorman, Michael R.
(U.S. Naval Postgraduate School Monterey, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Journal of Composite Materials
Volume: 26
Issue: 14
ISSN: 0021-9983
Subject Category
Structural Mechanics
Accession Number
93A11571
Distribution Limits
Public
Copyright
Other

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