Uncertainty evaluation of strain and strain rate measurements by ESPI during a tensile test

Bruno Guelorget; Manuel François; Guillaume Montay; Laurent Daniel; Jian Lu

doi:10.1117/12.695840

15 September 2006 Uncertainty evaluation of strain and strain rate measurements by ESPI during a tensile test

Bruno Guelorget, Manuel François, Guillaume Montay, Laurent Daniel, Jian Lu

Proceedings Volume 6341, Speckle06: Speckles, From Grains to Flowers; 63412K (2006) https://doi.org/10.1117/12.695840
Event: Speckle06: Speckles, From Grains to Flowers, 2006, Nimes, France

Abstract

Localization of plastic strain has been studied by measuring strain and strain rate during tensile test¹. Pictures were continuously recorded during the experiment and in-plane Electronic Speckle Pattern Interferometry (ESPI) pictures were generated afterwards, by subtracting couples of images. A square grid of 3 mm separation was drawn on the specimen to determine the true stress-true strain curve, while fringe patterns gave an access to relative displacements. Strain, average strain and strain rate were deduced. An uncertainty evaluation on these parameters was carried out applying the so-called law of propagation of uncertainties (ISO 07-020²).

Citation Download Citation

Bruno Guelorget, Manuel François, Guillaume Montay, Laurent Daniel, and Jian Lu "Uncertainty evaluation of strain and strain rate measurements by ESPI during a tensile test", Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 63412K (15 September 2006); https://doi.org/10.1117/12.695840

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