Acoustography, analogous to radiography and photography and developed by Raj Technology, is a process of producing images with acoustic waves on an acoustically sensitive liquid crystal display. Its application to the nondestructive evaluation of composite materials was investigated. Graphite/epoxy specimens of various thickness and layups and containing various flaw types were used. The flaw types included Kapton and Mylar inclusions, porosity, and impact and fatigue damage. Sensitivity losses for the acousto-optical display and the piezoelectric detector as a function of the ultrasonic incidence angle were determined. Specimen orientation with respect to the insonifying beam was not a critical factor in sensitivity.
|Original language||English (US)|
|Title of host publication||Review of Progress in Quantitative Nondestructive Evaluation|
|Number of pages||8|
|State||Published - Dec 1 1988|
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