Embedded fiber optic detection of ultrasound and its application to cure monitoring

Myo Myint Ohn; Andrew Davis; Kexing Liu; Raymond M. Measures

doi:10.1117/12.141309

26 March 1993 Embedded fiber optic detection of ultrasound and its application to cure monitoring

Myo Myint Ohn, Andrew Davis, Kexing Liu, Raymond M. Measures

Proceedings Volume 1798, Fiber Optic Smart Structures and Skins V; (1993) https://doi.org/10.1117/12.141309
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

The use of an embedded interferometric fiber optic sensor with an active homodyne demodulation scheme is demonstrated for the detection of propagating ultrasonic pulses in epoxy-matrix composites. Surface and embedded generation of ultrasound was accomplished by special transducers. Also reported are efforts directed towards the implementation of this in situ ultrasonic detection technique for cure monitoring in Hysol EPK 907, a room-temperature cured epoxy, and Hercules AS4/1919 composites. Similarities between the measured cure parameter, tau, and the viscosity of the epoxy during the cure process are discussed.

Citation Download Citation

Myo Myint Ohn, Andrew Davis, Kexing Liu, and Raymond M. Measures "Embedded fiber optic detection of ultrasound and its application to cure monitoring", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); https://doi.org/10.1117/12.141309

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