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Two-Dimensional Laser-Speckle Surface-Strain GaugeExtension of Yamaguchi's laser-speckle surface-strain-gauge method yields data on two-dimensional surface strains in times as short as fractions of second. Laser beams probe rough spot on surface of specimen before and after processing. Changes in speckle pattern of laser light reflected from spot indicative of changes in surface strains during processing. Used to monitor strains and changes in strains induced by hot-forming and subsequent cooling of steel.
Document ID
19930000187
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Barranger, John P. (NASA Lewis Research Center, Cleveland, OH.)
Lant, Christian (Sverdrup Technology, Inc.)
Date Acquired
August 16, 2013
Publication Date
April 1, 1992
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 4
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
LEW-15337
Accession Number
93B10187
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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