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Proceedings Paper

Application of a laser Raman sensor for stress monitoring in composites
Author(s): Bish Arjyal; Costas Galiotis
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Paper Abstract

Localized stress/strain measurements in polymer based composites can now be made using a laser Raman sensor. In this case the stress sensor is the reinforcing fiber of the composite and the detector is the Raman spectrometer. Measurements can be conducted in reinforcing fibers near the surface of laminates. For measurements in the bulk of composites, the exciting laser light has to be transported to the reinforcing fibers via an embedded fiber optic cable. The backscattered light is transmitted through the same fiber optic and is sent to the Raman spectrometer for analysis. The effect of the direction of the fiber optic cable with respect to the axis of the reinforcing fibers is examined. Finally, the relationships between the local fiber stress or strain obtained from the Raman sensor and the far field stress or strain measured conventionally, are established.

Paper Details

Date Published: 26 April 1996
PDF: 4 pages
Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); doi: 10.1117/12.237101
Show Author Affiliations
Bish Arjyal, Queen Mary and Westfield College (United Kingdom)
Costas Galiotis, Queen Mary and Westfield College (United Kingdom)


Published in SPIE Proceedings Vol. 2779:
3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials
Pierre Francois Gobin; Jacques Tatibouet, Editor(s)

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