Measuring and testing – Vibration – By mechanical waves
Patent
1992-09-17
1995-01-24
Goldstein, Herbert
Measuring and testing
Vibration
By mechanical waves
73600, G01N 2904, G01N 924
Patent
active
053833651
ABSTRACT:
The presence of a crack in a material and the orientation of the crack is determined by placing a transducer on the surface of the material for propagating a shear wave for reflection off of the back wall of the material. The reflected signal is evaluated such that no signal or a weak signal indicates the presence of a crack. The transducer is then held in place and rotated while propagating a shear wave in order to determine the orientation of the crack. The reflected shear wave is then evaluated in the same manner.
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Edwards Robert J.
Goldstein Herbert
Kalka Daniel S.
Oen William L.
The Babcock & Wilcox Company
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