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Strain field measurements in industrial applications using dual-beam digital speckle photography
Luleå tekniska universitet.
1998 (English)In: Optics and lasers in engineering, ISSN 0143-8166, E-ISSN 1873-0302, Vol. 30, no 5, p. 421-431Article in journal (Refereed) Published
Abstract [en]

Dual-beam digital speckle photography is a non-contacting full-field technique which can measure one strain component at the CCD-camera frequency. The technique uses two symmetrically incident laser beams of different wavelengths and the speckle field for each illumination beam is recorded simultaneously before and after object deformation. The system is designed for strain field measurements in rough environments. In this paper some experiments are performed to investigate the system performance. In a tensile test the measured strain value was found to be in good agreement with the strain given by resistance strain gauges. Experiments at elevated temperature have also been performed, where thermal strain fields were measured at 500°C.

Place, publisher, year, edition, pages
1998. Vol. 30, no 5, p. 421-431
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-2905DOI: 10.1016/S0143-8166(98)00034-7ISI: 000077432200005Local ID: 0a334260-0182-11dc-ad0a-000ea68e967bOAI: oai:DiVA.org:ltu-2905DiVA, id: diva2:975759
Note
Godkänd; 1998; 20070513 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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