抄録
In this paper, chirped fiber Bragg grating (FBG) sensors were applied for the detection of crack locations in CFRP laminates since the reflection spectrum from a chirped FBG was expressed as a function of the position along the grating. Two types of chirped FBG sensors were embedded in CFRP cross-ply laminate, and reflection spectra from the sensors were measured during loading-unloading tests. When transverse cracks appeared, the spectrum had dips at the wavelengths that corresponded to the locations of the transverse cracks. These results have revealed that chirped FBG sensors have a potential to detect the locations of transverse cracks through the changes in form of the reflection spectrum.
