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Microstructured optical fiber Bragg grating as an internal three-dimensional strain sensor for composite laminates

Abstract : In this article, we study the possibility to use a pair of specifically designed microstructured optical fiber Bragg gratings (MOFBGs) as a multi-component strain sensor when embedded within composite materials. The dependence on the orientation of the transverse sensitivity of the MOFBGs is exploited to build a sensing device able to measure the strain field along the three principal mechanical directions of a laminate composite. We developed an analytical and numerical model of such a sensor and benchmarked it with experiments performed on laminated composite coupons equipped with this sensor. We report on a theoretical strain resolution of about 5 μ in the transverse directions of the composite material, which is a six-fold improvement over results reported in literature. © 2015 IOP Publishing Ltd.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02184108
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Submitted on : Monday, July 15, 2019 - 6:04:15 PM
Last modification on : Wednesday, May 11, 2022 - 3:21:20 PM

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C. Sonnenfeld, G. Luyckx, S. Sulejmani, T. Geernaert, S. Eve, et al.. Microstructured optical fiber Bragg grating as an internal three-dimensional strain sensor for composite laminates. Smart Materials and Structures, IOP Publishing, 2015, 24 (5), pp.055003. ⟨10.1088/0964-1726/24/5/055003⟩. ⟨hal-02184108⟩

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