Brillouin optical correlation domain analysis in composite material beams

Research output: Contribution to journalJournal article – Annual report year: 2017Researchpeer-review



  • Author: Stern, Yonatan

    Bar-Ilan University, Israel

  • Author: London, Yosef

    Bar-Ilan University, Israel

  • Author: Preter, Eyal

    Bar-Ilan University, Israel

  • Author: Antman, Yair

    Bar-Ilan University, Israel

  • Author: Diamandi, Hilel Hagai

    Bar-Ilan University, Israel

  • Author: Silbiger, Maayan

    Xenom Ltd, Israel

  • Author: Adler, Gadi

    Xenom Ltd, Israel

  • Author: Levenberg, Eyal

    Section for Geotechnics and Geology, Department of Civil Engineering, Technical University of Denmark, Nordvej, 2800, Kgs. Lyngby, Denmark

  • Author: Shalev, Doron

    Doron Shalev Engineering Ltd., Israel

  • Author: Zadok, Avi

    Bar-Ilan University, Israel

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Structural health monitoring is a critical requirement in many composites. Numerous monitoring strategies rely on measurements of temperature or strain (or both), however these are often restricted to point-sensing or to the coverage of small areas. Spatially-continuous data can be obtained with optical fiber sensors. In this work, we report high-resolution distributed Brillouin sensing over standard fibers that are embedded in composite structures. A phase-coded, Brillouin optical correlation domain analysis (B-OCDA) protocol was employed, with spatial resolution of 2 cm and sensitivity of 1 °K or 20 micro-strain. A portable measurement setup was designed and assembled on the premises of a composite structures manufacturer. The setup was successfully utilized in several structural health monitoring scenarios: (a) monitoring the production and curing of a composite beam over 60 h; (b) estimating the stiffness and Young’s modulus of a composite beam; and (c) distributed strain measurements across the surfaces of a model wing of an unmanned aerial vehicle. The measurements are supported by the predictions of structural analysis calculations. The results illustrate the potential added values of high-resolution, distributed Brillouin sensing in the structural health monitoring of composites.
Original languageEnglish
Article number2266
Issue number10
Number of pages14
Publication statusPublished - 2017
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Structural health monitoring, Optical fiber sensors, Brillouin sensors, Composite materials, Composite beams, Strain measurements, Brillouin optical correlation domain analysis

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