Research on Wing Impact Damage Detection Based on FBG Smart interlayer and BAS-LSSVM

Abstract This paper reports research on wing impact damage detection based on a smart FBG interlayer and an SVM. The research results show that the embedding of intelligent interlayers has minimal impact on the strength performance of composite structures. The wavelength shift and strain of FBG sensors in intelligent interlayers exhibit a favorable linear relationship, and the interlayers can be embedded inside composite structures. Smart FBG interlayers are very suitable for nondestructive testing and evaluation of composite materials. After calibrating the strain load characteristics of FBG sensors in a smart interlayer, these sensors can be embedded in composite materials not only for monitoring structural stress and strain, but also for use in combination with advanced information processing technology to establish an active, online, and real-time monitoring system for sensing structural damage.