Inspection problem of composite materials using an ultrasonic signal processing

Abdessalem Benammar , Redouane Drai , Abderrezak Guessoum

In this paper, signal processing techniques associated to ultrasonic instrumentation are tested for their ability to resolve echoes reflected by delaminations in carbon fiber reinforced polymer multi-layered composite materials (CFRP). These techniques include the L2 norm deconvolution 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. Comparative study of the methods for their ability to resolve echoes is made. Theoretical and experimental results indicate resolution enhancement in detecting and locating delamination defects.

Mots clés: Non destructive testing; Composite Materials; Deconvolution; LP norms

Domaines: Acoustique [physics.class-ph]

Abdessalem Benammar, Redouane Drai, Abderrezak Guessoum. Inspection problem of composite materials using an ultrasonic signal processing. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810910⟩