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 language | English |
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Title of host publication | 24th International Conference on Optical Fibre Sensors |
Publisher | SPIE |
Publication date | 2015 |
Article number | 96346N |
DOIs | |
Publication status | Published - 2015 |
Externally published | Yes |
Event | 24th International Conference on Optical Fibre Sensors - Curitiba , Brazil Duration: 28 Sept 2015 → 2 Oct 2015 Conference number: 24 |
Conference
Conference | 24th International Conference on Optical Fibre Sensors |
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Number | 24 |
Country/Territory | Brazil |
City | Curitiba |
Period | 28/09/2015 → 02/10/2015 |
Series | Proceedings of SPIE - The International Society for Optical Engineering |
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ISSN | 0277-786X |
Keywords
- Stimulated Brillouin scattering
- Optical fiber sensors
- Structural health monitoring
- Composite materials
- Distributed sensors
- Strain measurements