Study of the Fiber Bragg’s Grating Sensor Sensibility Subjected to Harsh Environmental Conditions

Abstract

This study investigates the performance of Fiber Bragg Grating sensors bonded with an cyanoacrylate adhesive to different substrate materials (titanium, aluminum, and carbon-fiber-reinforced polymers) for Structural Health Monitoring applications in the aeronautical industry. The results show that thermal aging alters the adhesive layer, ultimately modifying the FBG sensor's sensing ability. A finite element model is used to study the most influential factors on the bonding agent and FBG sensor durability.