NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Burst prediction by acoustic emission in filament-wound pressure vesselsAcoustic emission in 51-cm diameter graphite/epoxy pressure vessels was monitored during pressurization (hydrotesting). Several vessels were subjected to impact by a blunt impactor, but only after the vessels had been proofed; that is, pressurized to 80 percent of nominal burst pressure as determined from control (unimpacted) vessels. AE activity was then monitored throughout a series of successively higher pressure cycles ranging from 10 to 60 percent of ultimate. Each cycle included a ramp up to pressure followed by a 4-min hold period and then pressure unload. The event rate was high, and especially modified AE analyzers had to be used to acquire the data. This paper presents the AE event count versus pressure history of these tests and demonstrates the ability of the AE technique to monitor the growth of damage and to estimate the effect on ultimate strength. The number of events that occurred during pressure holds proved to be a reasonable estimator of vessel performance.
Document ID
19910032745
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gorman, Michael R.
(U.S. Navy, Naval Postgraduate School, Monterey CA, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1990
Publication Information
Publication: Journal of Acoustic Emission
Volume: 9
ISSN: 0730-0050
Subject Category
Structural Mechanics
Accession Number
91A17368
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available