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Electromechanical Apparatus Measures Residual StressNondestructive test exploits relationship between stress and eddy-current-probe resistance. Yields data on residual stress or strain in metal tension/compression specimen (stress or strain remaining in specimen when no stress applied from without). Apparatus is assembly of commercial equipment: tension-or-compression testing machine, eddy-current probe, impedance gain-and-phase analyzer measuring impedance of probe coil, and desktop computer, which controls other equipment and processes data received from impedance gain-and-phase analyzer.
Document ID
19930000267
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Chern, Engmin J.
(NASA Goddard Space Flight Center, Greenbelt, MD.)
Flom, Yury
(NASA Goddard Space Flight Center, Greenbelt, MD.)
Date Acquired
August 16, 2013
Publication Date
May 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 5
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
GSC-13451
Accession Number
93B10267
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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