High-sensitivity measurements of deformation in a fatigue-loaded weld specimen using a portable moire interferometer

Robert Czarnek

doi:10.1117/12.172609

1 March 1994 High-sensitivity measurements of deformation in a fatigue-loaded weld specimen using a portable moire interferometer

Robert Czarnek

Author Affiliations +

Proceedings Volume 2004, Interferometry VI: Applications; (1994) https://doi.org/10.1117/12.172609
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

The present experiment demonstrates the application of high-sensitivity moire-interferometry to measurements of deformation around an artificial notch in a weld material on a specimen consisting of two 50 mm thick steel plates welded together. The tests were performed at the standard sensitivity of 417 mm per fringe order and the field of view was 20 mm by 20 mm. The 125 mm wide specimens were loaded in four-point bending under loads as high as 350 kN. The load was applied using a servo-controlled hydraulic testing machine. The compact moire interferometer was attached to one of the four loading points of the machine and was moving with it during load application. The experiment was performed in an industrial type facility without any means of reducing the vibrations of the experimental setup. The interferograms were analyzed using a digitizing tablet and hybrid technique of data processing.

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Robert Czarnek "High-sensitivity measurements of deformation in a fatigue-loaded weld specimen using a portable moire interferometer", Proc. SPIE 2004, Interferometry VI: Applications, (1 March 1994); https://doi.org/10.1117/12.172609

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KEYWORDS

Interferometers

Moire patterns

Deflectometry

Interferometry

Fringe analysis

Holography

Data processing

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