Thermosonics, also known as ultrasonic stimulated thermography, is a rapid non-destructive
evaluation technique that uses an infrared camera to visualise material defects by detecting …

Multiple signal classification (MUSIC) algorithm has gradually been applied to guided wave
based structural health monitoring (SHM) as a novel promising method, which is able to …

Nonlinear features extracted from Lamb wave signals (eg, second harmonic generation) are
demonstrably sensitive to microscopic damage, such as fatigue and material thermal …

Nonlinear ultrasonic methods typically measure second harmonic waves for a rapid and
sensitive detection of material micro-cracks. However, fictitious second harmonics generated …

Nonlinear ultrasound techniques have shown greater sensitivity to microcracks and they can
be used to detect structural damages at their early stages. However, there is still a lack of …

The traditional linear ultrasonic technique may not provide a clear indication of the
underlying damage in some cases of invisible or barely-visible impact damage. Considering …

The influence of porosity on the mechanical behaviour of composite laminates represents a
complex problem that involves many variables. Therefore, the evaluation of the type and …

Nonlinear ultrasonic techniques have been broadly used for detecting barely visible impact
damage (BVID) in carbon fiber reinforced plastic (CFRP) from both numerical and …

This paper presents a nonlinear elastic wave tomography method, based on ultrasonic
guided waves, for the image of nonlinear signatures in the dynamic response of a damaged …

The scaling subtraction method (SSM) is a non-destructive measurement approach used to
extract nonlinear features from the elastic response of a structure. As such it can be used for …