• Aucun résultat trouvé

Use of Guided Waves for Inspection of CompositeSkin-Honeycomb Core

N/A
N/A
Protected

Academic year: 2021

Partager "Use of Guided Waves for Inspection of CompositeSkin-Honeycomb Core"

Copied!
1
0
0

Texte intégral

(1)

Materials Science Forum

Volume 636-637, 2010, Pages 1533-1540

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

A. Satour, F. Boubenider, A. Badidibouda, R.Halimi

Abstract: 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.

Keywords : Lamb waves, Sandwich structure, Dispersion curves, Displacements.

Centre de Recherche en Technologies Industrielles - CRTI - www.crti.dz

Powered by TCPDF (www.tcpdf.org)

Références

Documents relatifs

2.16 Snapshot at time 45 µs showing the axial component of the sum of the incident field (created by a circular source located at the center) and the diffracted field by the 2 mm

C’est pour cette raison que j’ai instauré une sorte de rituel dans la classe avec des gestes simples comme : tendre les deux paumes de mes mains vers les élèves pour indiquer

EFFECT OF DEFECT ANGULAR-POSITION ON THE WAVE REFLECTION AND TRANSMISSION COEFFICIENTS: NUMERICAL INVESTIGATION BY THE WAVE FINITE ELEMENT

Motivated by our previous research on fiber distribution optimization in Fiber Reinforced Composite (FRC) structures [7], we extend the methodology to present

Two methods are used in modeling, 3D drawing of the sandwich structures and calculating an equivalent structure using the homogenization method based on

ii) We discuss the competition between Anderson localization and coherent leakage in presence of disorder. Near the band edges and in the presence of. disorder, the «

To the contrary, at a frequency equal to 0.5 MHz at which the SH 0 and SH 1 -like modes are roughly as sensitive to the bond shear property as to the aluminium or composite

Finally, the nonlinear convolution method allowed to take advantage of the harmonics related to the different resonance modes in order to define new nonlinear parameters