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Acoustic emission studies of large advanced composite rocket motor cases.Acoustic emission (AE) patterns were measured during pressure testing of advanced composite rocket motor cases made of boron/epoxy and graphite/epoxy. Both accelerometers and high frequency AE transducers were used, and both frequency spectrum and amplitude distribution were studied. The AE patterns suggest that precursor emission might be used in certain cases to anticipate failure. The technique of hold-cycle AE monitoring was also evaluated and could become a valuable decision gate for test continuation/termination. Data presented show similarity of accelerometers and AE transducer responses despite the different frequency response, and suggest that structural AE phenomena are broadband.
Document ID
19730039165
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Robinson, E. Y.
(California Institute of Technology, Jet Propulsion Laboratory, Applied Mechanics Div., Pasadena Calif., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Structural Mechanics
Meeting Information
Meeting: Annual Conference on Reinforced plastics - Ever new
Location: Washington, DC
Start Date: February 6, 1973
End Date: February 9, 1973
Accession Number
73A23967
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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