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Use of Guided Waves for Inspection of Composite Skin-Honeycomb Core

A. Satour, F. Boubenider, A. Badidibouda, R.Halimi  (2010)
Publication

Sandwich plates, made of two aluminum layers and a metal honey comb core are used inthe aircraft industry. The purpose of this study is to show the ultrasonic guided waves sensibility to discover delamination in skin-honeycomb sandwich structures used in aeronautics. Separation between the skin and the core can appear during the manufacture or after use. In this work, Lamb's waves are used to control this kind of plane structure. Indeed, these waves have the advantage to putin vibration the totality of the plate that we want to control and they propagate on long distances without too much attenuation. The revealing, by the guided waves, of the unsticking which canmeet on such sandwiches, between the plate and the honeycomb core is studied and commented. Voir les détails

Mots clés : Lamb waves, Sandwich structure, Dispersion curves, Displacements.