The past decades have been marked by a significant increase in research interest in
nonlinearities in micro-cracked and cracked solids. As a result, a number of different …

Ultrasonic-based non-destructive testing technologies have been extensively applied for
detection of internal damage in concrete. However, it is vulnerable to environmental …

The use of supplementary cementitious materials (SCMs) can improve the properties of
concrete, reduce pressure on natural resources and CO 2 emissions. However, certain …

As a sound transmitting device based on the nonlinear acoustic theory, parametric acoustic
array (PAA) is able to generate high directivity and low frequency broadband signals with a …

Due to the low density of the aggregates used, lightweight aggregate concrete (LWAC) is
susceptible to segregation because of the differences between the densities of their …

An improved technique for sensing damage initiation and progression in thermoplastic resin
composite plate specimens is presented in this study. The composite plate specimens are …

In this article, a holistic technique for sensing damage initiation, as well as damage
progression in composite plates, is presented combining linear and nonlinear ultrasonic …

Abstract The ultrasonic Non-Destructive Testing and Evaluation (NDT&E) has been widely
used for Structural Health Monitoring (SHM). The conventional linear ultrasonic technique …

As the mechanical properties of concrete subjected to high-temperature heating decrease
due to continuous degradation, it is necessary to evaluate the integrity of concrete in real …

Non-linear ultrasonic testing, based on higher order harmonic generation, is a true mean for
nondestructive evaluation of concrete allowing damage detection at early stages of damage …