The capability of an ultrasonic inspection technique to detect separation at the case-liner and liner-propellant interfaces is described. It is reported that the ultrasonic multiple reflection method now being used in factories, is most effective in detecting cas-liner separation, but is not very effective in detecting liner-propellant separation. As a result of experiments using rocket models, it is found that a multiple reflection method is capable of detecting not only case-liner separation but also liner-propellant separation if a continuously variable frequency oscillator is used and the reflectograms are analyzed considering interference. (Author)
On the Ultrasonic Inspection of Separation in Solid Propellant Rocket Motors
1972
21 pages
Report
No indication
English
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