Detection of delamination defects in CFRP materials using ultrasonic signal processing

Auteurs :  Abdessalem BENAMMAR, Redouane DRAI, Abderrezak GUESSOUM
Année : 2008
Domaine : Electronique
Type : Article de journal
Revue : Ultrasonics
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés : Ultrasonic NDE, composite materials, CFRP, SSP, Deconvolution, EM algorithm

Résumé : 

In this paper, signal processing techniques are tested for their ability to resolve echoes associated with delaminations in carbon fiber-reinforced polymer multi-layered composite materials (CFRP) detected by ultrasonic methods. These methods include split spectrum processing (SSP) and the expectation–maximization (EM) algorithm. A simulation study on defect detection was performed, and results were validated experimentally on CFRP with and without delamination defects taken from aircraft. Comparison of the methods for their ability to resolve echoes are made.