High-resolution Brillouin analysis of composite materials beams

Yosef London, Yair Antman, Maayan Silbiger, Liel Efraim, Avihay Froochzad, Gadi Adler, Eyal Levenberg, Avi Zadok

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

High-resolution Brillouin optical correlation domain analysis of fibers embedded within beams of composite materials is performed with 4 cm resolution and 0.5 MHz sensitivity. Two new contributions are presented. First, analysis was carried out continuously over 30 hours following the production of a beam, observing heating during exothermal curing and buildup of residual strains. Second, the bending stiffness and Young's modulus of the composite beam were extracted based on distributed strain measurements, taken during a static three-point bending experiment. The calculated parameters were used to forecast the beam deflections. The latter were favorably compared against external displacement measurements.
Original languageEnglish
Title of host publication24th International Conference on Optical Fibre Sensors
PublisherSPIE
Publication date2015
Article number96346N
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event24th International Conference on Optical Fibre Sensors - Curitiba , Brazil
Duration: 28 Sep 20152 Oct 2015

Conference

Conference24th International Conference on Optical Fibre Sensors
CountryBrazil
CityCuritiba
Period28/09/201502/10/2015
SeriesProceedings of S P I E - International Society for Optical Engineering
ISSN0277-786X

Keywords

  • Stimulated Brillouin scattering
  • Optical fiber sensors
  • Structural health monitoring
  • Composite materials
  • Distributed sensors
  • Strain measurements

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