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Development of a laser shock adhesion test for the assessment of weak adhesive bonded CFRP structures

Article dans une revue avec comité de lecture
Author
EHRHART, Bastien
242620 Fraunhofer Institute for Nondestructive Testing [Fraunhofer IZFP]
ECAULT, Romain
118112 Institut Pprime [UPR 3346] [PPrime [Poitiers]]
TOUCHARD, Fabienne
118112 Institut Pprime [UPR 3346] [PPrime [Poitiers]]
BOUSTIE, Michel
118112 Institut Pprime [UPR 3346] [PPrime [Poitiers]]
BERTHE, Laurent
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
BOCKENHEIMER, Clemens
242528 Airbus Group [Germany]
VALESKE, Bernd
242620 Fraunhofer Institute for Nondestructive Testing [Fraunhofer IZFP]

URI
http://hdl.handle.net/10985/8417
DOI
10.1016fj.ijadbadh.2014.04.002
Date
2014
Journal
International Journal of Adhesion and Adhesives

Abstract

Adhesive bondin,g bas a great poœnlial far future ligbtweight bigb-loaded structures in the a.eronautic industiy. A preœquisite for sucb an application is dtat the bond quality of the adhesive joint can be assessed in a non-destructive way. However, the use of da.ssicaJ Non•DesiiUctive Techniques (NDT) does not aUow the evaluation of the adhesion stren,gt:h of an adhesive bond yet This paper pn!sents an investigation made on weak composite bonds in on!er to develop a laser shock wave adhesion test First, the procedure to produce controlled weak bonds is desaibed. CFRP bonded samples are pn!pared in a spedfic way and characterized by ultrasonic techniques to assess the absence of any detectable defect. 1ben, for sorne of the .samples, their bond streDgth is evaluated by mechanical destructive œsts and ether .samples are loaded by v.arious intensity lasers shocks. The obtained results help to understand the behavior of the composite bonds under Jaser shock loading:. thanks to two post-mortem techrùques. 1becorrelation between the laser parameterS and the induced damage is demon.strated, The potential of the laser shock. technique to dl.saiminate different bond quallties is shawn, and the need for the œst optinùzationlsdÛ(U

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