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Proceedings Paper

All-fiber optoelectronic sensor with Bragg gratings for in-situ cure monitoring
Author(s): Andrea Cusano; Giovanni Breglio; Antonello Cutolo; Antonio Maria Calabro; Michele Giordano; Luigi Nicolais
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Paper Abstract

Real-time, in situ monitoring for quality control of the polymer cure process is of high interest, since thermoset polymer-matrix composite are widely used in large industrial areas: aeronautical, aerospace, automotive and civil due to their low cost/low weight features. However, their final properties are strongly dependence on the processing parameters, such as temperature and pressure sequence. The key-point for advanced composite materials is the possibility to have distributed and simultaneous monitoring of chemoreological and physical properties during the cure process. To this aim, we have developed and tested an optoelectronic fiber optic sensor based on the Fresnel principle able to monitor the variations of the refractive index due to the cure process of an epoxy based resin. Experimental results have been obtained on sensor capability to monitor the cure kinetics by assuming the refractive index as reaction co-ordinate. The integration with in-fiber Bragg grating in order to measure the local temperature has been discussed and tested.

Paper Details

Date Published: 31 August 2000
PDF: 8 pages
Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397915
Show Author Affiliations
Andrea Cusano, Univ. of Naples Federico II (Italy)
Giovanni Breglio, Univ. of Naples Federico II (Italy)
Antonello Cutolo, Univ. of Sannio (Italy)
Antonio Maria Calabro, Italian Aerospace Research Ctr. (Italy)
Michele Giordano, Institute of Composite Materials Technology (Italy)
Luigi Nicolais, Institute of Composite Materials Technology (Italy)


Published in SPIE Proceedings Vol. 4074:
Applications of Optical Fiber Sensors
Alan J. Rogers, Editor(s)

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