28 September 2015 High-resolution Brillouin analysis of composite materials beams
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96346N (2015) https://doi.org/10.1117/12.2194521
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
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.
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Yosef London, Yosef London, Yair Antman, Yair Antman, Maayan Silbiger, Maayan Silbiger, Liel Efraim, Liel Efraim, Avihay Froochzad, Avihay Froochzad, Gadi Adler, Gadi Adler, Eyal Levenberg, Eyal Levenberg, Avi Zadok, Avi Zadok, } "High-resolution Brillouin analysis of composite materials beams", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96346N (28 September 2015); doi: 10.1117/12.2194521; https://doi.org/10.1117/12.2194521

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