Application of a laser Raman sensor for stress monitoring in composites

Bish Arjyal; Costas Galiotis

doi:10.1117/12.237101

26 April 1996 Application of a laser Raman sensor for stress monitoring in composites

Bish Arjyal, Costas Galiotis

Author Affiliations +

Proceedings Volume 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials; (1996) https://doi.org/10.1117/12.237101
Event: 3rd International Conference on Intelligent Materials, 1996, Lyon, France

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.

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Bish Arjyal, Bish Arjyal, Costas Galiotis, Costas Galiotis, "Application of a laser Raman sensor for stress monitoring in composites", 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; https://doi.org/10.1117/12.237101

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