Multi-resolution non-contact damage detection in complex-shaped composite laminates using ultrasound

A Review of Laser Ultrasonic Lamb Wave Damage Detection Methods for Thin-Walled Structures

“…Laser ultrasonic Lamb waves were combined with the laser ultrasonic body wave detection method [ 137 ]. The longitudinal waves penetrate the structure in a short time without dispersion [ 139 , 140 , 141 ].…”

Non-contact detection of ultrasound with light – Review of recent progress

“…Although Lamb waves lack the resolution and sensitivity of high frequency LUS, they can be measured using commercial scanning vibrometers with the possibility of using non-contact laser excitation [86] , [89] . An example of using full-field local wavenumber imaging in combination with LUT in a multi-resolution approach was presented by [90] to detect and characterize damage in a composite sample of complex shape. At the first stage, the structure was scanned using a commercial vibrometer with signal excitation by a piezoelectric transducer.…”

Self-reference broadband local wavenumber estimation (SRB-LWE) for defect assessment in composites

“…In the last decades, multiple methods were developed to convert the full wavefield dataset to a damage map [10][11][12][13][14][15][16][17][18][19][20][21][22]. For the method to be successful, the obtained damage map must reveal all defects and preferably also allow for defect evaluation (i.e.…”