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Laser Shearography Reveals Hidden "Unbonds"Flaws identified faster than in ultrasonic inspection. Holographic technique detects hidden "unbonds", and does not require elaborate provisions for suppression of vibrations. Laser-shearographic apparatus used to observe object while stress being applied. Shearographic image indicative of deflection caused by stress. Also used to inspect complexly contoured surfaces.
Document ID
19920000644
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Schaefer, Lloyd A. (Rockwell International Corp.)
Date Acquired
August 15, 2013
Publication Date
October 1, 1992
Publication Information
Publication: NASA Tech Briefs
Volume: 16
Issue: 10
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-29814
Accession Number
92B10644
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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