Determination of strain distribution and temperature gradient profiles from phase measurements of embedded fibre Bragg gratings - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Optics A: Pure and Applied Optics Année : 2006

Determination of strain distribution and temperature gradient profiles from phase measurements of embedded fibre Bragg gratings

Résumé

In this paper, a powerful method for measuring non-uniform strain is reviewed and extended to the measurement of temperature gradients inside an epoxy part. The sensor is an embedded fibre Bragg grating and the method is based on the measurements of the grating phase obtained by combining optical low coherence interferometry and an inverse scattering algorithm. This method has a great potential and for the first time experimental results obtained for both strain distribution and temperature gradient are presented. By applying a tensile test, strain distribution measurements are first compared with finite element simulations to validate previous published results. Second, original temperature gradient measurements in a solid body are shown. The results are in good accordance with reference measurements achieved with thermocouples incorporated into the body.
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Dates et versions

hal-01006728 , version 1 (27-01-2018)

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Xavier Chapeleau, Pascal Casari, Dominique Leduc, Y. Scudeller, Cyril Lupi, et al.. Determination of strain distribution and temperature gradient profiles from phase measurements of embedded fibre Bragg gratings. Journal of Optics A: Pure and Applied Optics, 2006, 8, pp.1-7. ⟨10.1088/1464-4258/8/9/011⟩. ⟨hal-01006728⟩
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