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Ultrasonic Inspection With Angular-Power-Spectrum ScanningPrincipal advantage of angular-power-spectrum scanning (APSS) is that, unlike x-radiography and prior ultrasonic techniques, it reveals subtle distributions of microstructural features; e.g., variations in densities of micropores or regions in which fibers and matrices are poorly bonded to each other. Potential applications include development and characterization of composite-material components of large structures, such as buildings and bridges; determination of quality and detection of damage in fiberglass hulls, surfboards, ladders, and scaffolds; and development of porous prosthetic skins and complicated "smart" materials. Superposed diffraction patterns give clues to internal structural features of ceramic composites.
Document ID
19940000433
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Generazio, Edward R.
(NASA Lewis Research Center, Cleveland, OH.)
Date Acquired
August 16, 2013
Publication Date
August 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 8
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
LEW-15386
Accession Number
94B10433
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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