Nondestructive testing technique measures densities of transply cracks and used to monitor propagation of such damage in advanced polymer-matrix composite materials. Acousto-ultrasonic measuring apparatus, used to measure stress-wave factors (SWF's) of undamaged specimens and specimens that contained various numbers of transply cracks. Acousto-ultrasonic technique of value in examining damage to material from one surface only.
Ultrasonic Detection Of Transply Cracks In Composites
NASA Tech Briefs ; 13 , 3
1989-03-01
Miscellaneous
No indication
English
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