Scattering analysis of nonlinear Lamb waves at delaminations in composite laminates

This study investigates the higher harmonic generation of Lamb wave at a delamination due to contact acoustic nonlinearity, which is clapping phenomenon between sublaminate surfaces interaction with delamination. In this study, harmonics induced in composite laminates are studied detail. performs both numerical and experimental studies. A three-dimensional finite element model proposed for predicting propagation nonlinear waves verified using experimentally measured data. The results show can reasonably predict generated by nonlinearity. It found that major source nonlinearity laminates. mode conversion also carried out gain further physical insight into