Abstract
Health monitoring technologies are very important for improving the safety and durability of composite structures. FBG sensors are candidates for sensing devices for health monitoring. In this research, small-diameter FBG sensors were embedded in CFRP layers in a filament wound composite tank. Real time strain measurement of the tank during cure process and pressure test was performed by using the wavelength shift of the reflection light from the FBG sensors. Furthermore, the detection of microscopic damages was attempted by the observation of the deformation of the reflection spectrum.
