Measurement of Surface Strains from a Composite Hydrofoil using Fibre Bragg Grating Sensing Arrays.

摘要

This report details a methodology for the permanent attachment of fibre optic strain gauge (Bragg grating) arrays to the surface of a composite hydrofoil and reports on an experiment to measure surface strains from the hydrofoil under static and fatigue loading conditions. The strain data from the optical gauges is compared to measurements from electrical resistance strain gauges nearby and to model predictions and an assessment is made on the suitability of this technique for strain-mapping in a service environment.