Abstract
In this study, we estimated the damage pattern in a CFRP cross-ply laminate containing an open hole using an embedded Fiber Bragg Gratings (FBG) sensor. The damage pattern near the hole was investigated by finite element an alysis with cohesive elements, and the reflection spectrum of the embedded FBG sensor was analyzed from the strain distribution obtained in the damage analysis. Based on the above analysis, the damage pattern expressed by the residual strength distribution of the cohesive elements was optimized as an inverse problem, while the spectrum shape was adopted as the objective function. The damage pattern estimated from the measured spectrum agreed with the observation.
