A Laser Speckle Method for Measuring Displacement Field. Application to Resistance Heating Tensile Test on Steel

Abstract:

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Strain field measurement with non intrusive techniques is needed in order to characterize the behaviour of steels at high temperatures subjected to small displacements. In this work we present a technique based on laser-produced speckles coupled with a cross-correlation cross-spectrum method. This method proves more accurate than cross-correlation for small displacements. The laser wave length used (532 nm) allows to perform strain measurements, even with heat radiation.

Info:

Periodical:

Edited by:

R.A.W. Mines and J.M. Dulieu-Barton

Pages:

135-140

DOI:

10.4028/www.scientific.net/AMM.24-25.135

Citation:

C. Pradille et al., "A Laser Speckle Method for Measuring Displacement Field. Application to Resistance Heating Tensile Test on Steel", Applied Mechanics and Materials, Vols. 24-25, pp. 135-140, 2010

Online since:

June 2010

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