Abstract
The nondestructive characterization and monitoring of defects in composite structures by ultrasonic guided waves are hindered by the complexity of the interaction. Efficient computational modeling of propagating ultrasonic guided waves in waveguides with discontinuities is necessary to properly tune inspections and correctly interpret the scattering behavior. This paper studies the influence of different defect types in composite plates on ultrasonic guided wave scattering. Employing a hybrid global–local method, the energy spectra of transmitted and reflected waves in defected composite plates are numerically analyzed over a broad frequency range. Through parametric analyses of defect dimensions and locations, the resulting trends of the effect of specific defect features on the scattering behavior, as well as the importance of observing scattering on a broad frequency range, are accurately computed and highlighted. The presented findings indicate the potential for effective defect characterization and monitoring.
Graphical Abstract Figure
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