| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Voet, E.
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Topics
Publications (16/16 displayed)
- 2014Internal strain monitoring in composite materials with embedded photonic crystal fiber Bragg gratings
- 2013Opportunities for Structural Health Monitoring of Composite Material Structures with Novel Microstructured Optical Fiber Sensors
- 2012In-situ local strain measurement in textile composites with embedded optical fibre sensors
- 2011Microstructured optical fiber sensors embedded in a laminate composite for smart material applications
- 2011Evaluation of the transversal strain state in a satin weave composite using fibre Bragg gratings
- 2011Local strain in a 5-harness satin weave composite under static tension: Part I - Experimental analysiscitations
- 2010Influence of the Internal Yarn Nesting (Shifting) on the Local Structural Response of a Satin Weave Composite-An Experimental and Numerical Overview
- 2009On the feasibility of optical fibre sensors for strain monitoring in thermoplastic composites under fatigue loading conditionscitations
- 2009Strain monitoring of FRP elements using an embedded fibre optic sensorcitations
- 2009Response of Fiber Bragg Gratings in Microstructured and Bow Tie Fibers Embedded in Laminated Composite
- 2009Fiber Bragg Gratings in Microstructured Optical Fibers for Stress Monitoring
- 2009Response of FBGs in Microstructured and Bow Tie Fibers Embedded in Laminated Compositecitations
- 2009Benchmarking the response of Bragg gratings written in microstructured and bow tie fiber embedded in composites
- 2009Transversal load sensing with fiber Bragg gratings in microstructured optical fibers
- 2008The use of optical fibers for fatigue testing of fiber-reinforced thermoplastics
- 2007Strain monitoring in thermoplastic composites with optical fiber sensors: Embedding process, visualization with micro-tomography, and fatigue resultscitations
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document
Internal strain monitoring in composite materials with embedded photonic crystal fiber Bragg gratings
Abstract
The possibility of embedding optical fiber sensors inside carbon fiber reinforced polymer (CFRP) for structural health monitoring purposes has already been demonstrated previously. So far however, these sensors only allowed axial strain measurements because of their low sensitivity for strain in the direction perpendicular to the optical fiber's axis. The design flexibility provided by novel photonic crystal fiber (PCF) technology now allows developing dedicated fibers with substantially enhanced sensitivity to such transverse loads. We exploited that flexibility and we developed a PCF that, when equipped with a fiber Bragg grating (FBG), leads to a sensor that allows measuring transverse strains in reinforced composite materials, with an order of magnitude increase of the sensitivity over the state-of-the-art. In addition it allows shear strain sensing in adhesive bonds, which are used in composite repair patches. This is confirmed both with experiments and finite element simulations on such fibers embedded in CFRP coupons and adhesive bonds. Our sensor brings the achievable transverse strain measurement resolution close to a target value of 1 mu strain and could therefore play an important role for multi-dimensional strain sensing, not only in the domain of structural health monitoring, but also in the field of composite material production monitoring. Our results thereby illustrate the added value that PCFs have to offer for internal strain measurements inside composite materials and structures.