Delamination-induced relative natural frequency change curve and its use for delamination localization in laminated composite beams

Delamination is one common type of damage in composite laminates. To avoid structural failure and catastrophic events, detecting delamination is vital. Vibration-based delamination detection methods, which employ changes in structural dynamic properties such as natural frequencies, have been extensively investigated. However, natural frequency is generally considered as a global dynamic property and as such cannot identify local locations of...