In this article, we present an overview of recent progress in non-contact remote optical
detection of ultrasound in application to nondestructive testing and evaluation of materials …

Abstract The Synthetic Aperture Focusing Technique (SAFT) is an imaging algorithm used in
laser ultrasonics (LU) to visualise the appearance of defects. However, ultrasound excited …

Zero-group velocity (ZGV) modes in rails are studied through simulation and experiments in
this work. Local resonances associated with ZGV modes appear as distinct, sharp peaks in …

The paper concerns assessing the quality of the adhesive connection between a steel plate
and the reinforcing CFRP laminate. A three-stage algorithm for non-destructive damage …

Despite the demonstrated effectiveness of methods based on local defect resonance (LDR)
in defect identification and sizing, the precision of LDR prediction is limited owing to the …

Ultrasonic non-destructive evaluation in pulse-echo mode is used for the inspection of single-
lap aluminum adhesive joints, which contain interface defects in bonding area. The aim of …

Rayleigh waves are widely used in the nondestructive testing of structures due to the energy
concentrating nature. Nevertheless, the wave characteristics become dispersive and …

A method to quantify the interface shear stiffness, adhesive shear modulus and adhesive
thickness in an aluminium-epoxy-aluminium joint is presented. Shear horizontal guided …

Adhesively bonded metals are increasingly used in many industries. Inspecting these parts
remains challenging for modern non-destructive testing techniques. Laser ultrasound (LU) …

This study presents an automated technique combining ultrasonic pulse echo method with
machine learning algorithms to detect and classify the depth of interface defects in …