This article presents a comprehensive review of the laser-based guided ultrasonic waves
propagation imaging (G-UPI) system and respective signal/data processing methods related …

The band gap has been used to control the transmission features of acoustic/elastic waves.
Roton-like dispersion relations show that the energy and momentum of acoustic waves are …

Inspection of adhesively bonded metallic plates, commonly used in aircraft structures,
remains challenging for modern non-destructive testing (NDT) techniques. When a probing …

Understanding contact mechanics and adhesion processes in thin films and micro-
structured materials is fundamental in phonon and heat transport phenomena and is …

Abstract Zero-group-velocity (ZGV) waves have the peculiarity of being stationary, and thus
locally confining energy. Although they are particularly useful in evaluation applications …

Driven by the rapid advancement in manufacturing technologies, engineering structures with
complex geometries are increasingly applied in various industries, posing challenges to the …

Residual stress and its distribution are the key indicators to ensure structural integrity.
However, current ultrasonic methods are not appropriate for complex stress measurement …

Dispersion curves of elastic waveguides exhibit points where the group velocity vanishes
while the wavenumber remains finite. These are the so-called zero-group-velocity (ZGV) …

Extensive research has been conducted on zero-group-velocity (ZGV) Lamb waves in
elastic plates, demonstrating significant progress in the field of nondestructive testing …

To date, the phenomenon of zero group velocity (ZGV) Lamb wave in a stress-free elastic
plate has been well studied and used in non-destructive material characterization …