Embedded optical fiber strain rosette for in-plane measurements

Jerome Matrat; Klas Levin

doi:10.1117/12.472617

27 June 2002 Embedded optical fiber strain rosette for in-plane measurements

Jerome Matrat, Klas Levin

Proceedings Volume 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems; (2002) https://doi.org/10.1117/12.472617
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

Abstract

Bragg grating sensors have been proved to be well suited for strain sensing, but they are restricted to give only one-dimensional strain information. In the present study, embedded interferometric Bragg grating sensors are arranged in a rosette configuration to measure the in-plane strains. The rosette is based on three sensors, which are embedded along the reinforcement in three different plies. An analytical and experimental work is carried out to demonstrate how in-plane strains can be determined for arbitrary in-plane loading. Considering the three-dimensional strain effect of embedded sensors, the phase output was related to the laminate strain. The relationship between the optical response from each sensor and the strains in the laminate was obtained. Experimental results obtained from the embedded fibre optic strain rosette in tension, compression and shear are described. The obtained strains were compared to those measured by surface mounted resistive strain gauges. It was shown that embedded optical sensors provide an effective way to measure in-plane strain components in laminates.

Citation Download Citation

Jerome Matrat and Klas Levin "Embedded optical fiber strain rosette for in-plane measurements", Proc. SPIE 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems, (27 June 2002); https://doi.org/10.1117/12.472617

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