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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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Jang, Sei-Hum
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2019NDE THERMAL MAPPING USING THERMOCHROMIC SENSOR FILMS
- 2018Thermochromic Polymer Film Sensors for Detection of Incipient Thermal Damage in Carbon Fiber–Epoxy Compositescitations
- 2017Detection of incipient thermal damage in carbon fiber-epoxy composites using fluorescent thermal sensor films
- 2016Time temperature indicator film for monitoring composite repair adhesive cure using thermochromic fluorescent molecules
- 2014Time-temperature indicator for evaluating incipient thermal damage of CFRP
- 2014Damage detection for aerospace composites using matrix resins functionalized with fluorescent probe molecules
- 2013Influence of matrix resin mechanical properties on mechanochromic fluorescent damage probe response
- 2013Thermal damage detection of CFRP using coatings doped with fluorescent probes
- 2005Exceptional electro-optic properties through molecular design and controlled self-assemblycitations
- 2005Acentric lattice electro-optic materials by rational designcitations
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document
Influence of matrix resin mechanical properties on mechanochromic fluorescent damage probe response
Abstract
A non-destructive inspection (NDI) technique that integrates mechanochromic fluorescent probe molecules into aerospace matrix resins was investigated. This experiment was focused on determining the effect of the matrix resin mechanical properties on the activity of the fluorescent probe molecule. In the first step of this experiment, samples of epoxy (diglycidyl ether of bisphenol A (DGEBA)-diethylenetriamine (DETA)) functionalized with fluorescent probe molecules were fabricated. To change the mechanical properties of the epoxy samples, diglycidyl ether (polypropylene glycol) (DGE(PPG)) was added to the samples incrementally from 0-100 weight percent (wt%). To determine the effect of mechanical deformation on the probe in cured DGEBA/DGE(PPG)-DETA, fluorescence spectra were taken before and after incremental compression of the functionalized epoxy samples. The fluorescence testing revealed that the fluorescence activation increases with increasing compressive strain, strain energy, and stress, with a linear relation between fluorescence activation and strain. Furthermore, the fluorescence testing revealed that the fluorescence activation decreased as the modulus of the sample decreased, with the exception of the neat DGEBA-DETA sample. The fluorescence testing also revealed that, without exception, the fluorescence activation decreased as the glass transition temperature decreased and as the wt% DGE(PPG) increased, with no fluorescence activation for 40 wt% DGE(PPG) and above. Copyright 2013 by Aurora Flight Sciences.