Fiber-optic sensors and fracture mechanics

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This chapter presents a review on the studies done to test the applicability of fiber-optic sensors to fracture mechanics. The Mach-Zehnder, Michelson and Fabry-Perot interferometric sensors have been used, in both surface and embedded configurations, to measure strains near a crack tip. The strains are used to determine the opening mode stress intensity factor, KI, using linear elastic fracture mechanics. Results show that all the three sensors can be used successfully to measure the stress intensity factor, with the Fabry-Perot sensor being found to be the most accurate.

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Applications of Fiber Optic Sensors in Engineering Mechanics

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