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CFRP Fuselage Panel Behavior Monitoring Using Fibre Optic and Resistance Sensors and Optical Contactless Measurements

The monitoring of stiffened composite panels behavior using resistance strain gauges (SG), fibre optic Bragg grating sensors (FOBG) and contactless optical measurements based on digital image correlation (DIC) principle is discussed in the paper. Both the panel structure and different load cases are specified. Mechanical tests include different load-scenarios like static and fatigue loading in compression of reference and impacted panels. The main reason of failure is buckling. The measurements taken from the sensors captured all changes in the buckling modes of the panel. Moreover, they showed a good correlation between FOBG and SG strain measurements.