Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1994-10-11
1996-05-21
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73800, 356237, G01N 308
Patent
active
055178618
ABSTRACT:
An apparatus for monitoring the growth of surface cracks in materials includes a servo-hydraulic test machine which applies a load to a specimen according to a predetermined loading regime designed to induce crack growth in the specimen, a UV laser for illuminating the specimen with a light having a frequency greater than the frequency of incandescent light, a UV video camera and a two dimensional imaging computer. Optionally, the two dimensional imaging computer can be used to control the servo-hydraulic test machine.
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System Description and Operating Instructions for Model PN-232 entitled "Laser-Augmented Welding Vision System" manufactured by Control Vision, Inc.
Documentation entitled "Some Benefits of Laser-Enhanced Welding Vision" by Control Vision, Inc.
Documentation entitled "Laser Video for Welding . . . Arc Welding Without the Arc!" by Control Vision, Inc.
Paper entitled "Measurement of Small Cracks by Photomicroscopy: Experiments and Analysis" by James M. Larsen et al.
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Annigeri Balkrishna S.
Favrow Leroy H.
Haas Robert J.
Wegge Jason S.
Winter Michael
Chilcot Richard
Curbelo Pamela J.
McCall Eric S.
United Technologies Corporation
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