1 May 1994 Combined sensor system for process and in-service health monitoring of composite structures
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Advanced composite materials have evolved to be the class of materials which meet the strict requirements of many ground- and space-based critical structures. Structures that incorporate these novel materials are frequently exposed to harsh environments during service and must be manufactured using high quality standards. Not only is it desirable to monitor and control the fabrication process of these materials using embedded sensors, but it is also necessary to instrument these structures with devices that allow in-service health monitoring. This paper describes an approach which integrates an optical fiber time domain strain and temperature monitoring network with a fiber optic cure monitoring system for composite materials. The proof-of-concept tests consisted of fabricating a thermoset composite laminate that combined a multi-segment optical fiber sensor network, monitored the state of cure during the fabrication of the laminate, and determined strain and temperature during tests performed after fabrication. Software was written to interface a commercially available optical time domain reflectometer system to a personal computer.
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Ken-An Lou, Ken-An Lou, Bernd D. Zimmermann, Bernd D. Zimmermann, Gershon Yaniv, Gershon Yaniv, } "Combined sensor system for process and in-service health monitoring of composite structures", Proc. SPIE 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation, (1 May 1994); doi: 10.1117/12.173963; https://doi.org/10.1117/12.173963

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