Rachid El Guerjouma

TL;DR: Quantitative results of applying nonlinear acoustic dynamics to study progressive damage in a polymer-based composite SMC (sheet molding compound) are presented and interesting logarithmlike changes of the SNLD parameters as a function of the acoustic emission cumulated energy are found.

TL;DR: In this article, the feasibility of embedding piezoelectric sensor to detect the acoustic emission (AE) activities in sandwich composites has been investigated experimentally, where a series of sandwich specimens with and without embedded sensor were tested in three-point bending in static and fatigue loading while continuously monitoring the response by the AE technique.

TL;DR: In this paper, a series of composite laminates with and without piezoelectric implant were subject to three-point bending in static and creep tests while continuously monitoring the response by the acoustic emission (AE) technique.

TL;DR: In this article, the authors present a procedure for investigating local damages created in sandwich composites based on the processing of the recorded acoustic emission hits, which is based on an unsupervised approach.

TL;DR: A guided wave approach is proposed to characterize polymer based composite plates taken at intact as well as damaged states, based on the evolution of the velocity frequency dispersion of the generated guided waves.