A damage identification technique for CF/EP composite laminates using distributed piezoelectric transducers

摘要

In this study, a damage identification approach was developed for carbon fibre/epoxy composite laminates with localized internal delamination. Propagation of the Lam wave in laminates and its interaction with the delmaination were examined. The funda- mental symmetric Lamb wave mode, S_0, and the lowest order shear wave mode, S'_0, were chosen to predict damage location. A real- time active diagnosis system was therefore established. This technique uses distributed piezoelectric transducers to generate and monitor the ultrasonic Lamb wave with narrowband frequency.