Development of a laser shock adhesion test for the assessment of weak adhesive bonded CFRP structures
TypeArticles dans des revues avec comité de lecture
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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Experimental and numerical investigations of shock and shear wave propagation induced by femtosecond laser irradiation in epoxy resins ECAULT, Romain; BERTHE, Laurent; TOUCHARD, Fabienne; BOUSTIE, Michel; LESCOUTE, Emilien; SOLLIER, Arnaud; VOILLAUME, Hubert (IOP Publishing Ltd, 2015)In this work, original shock experiments are presented. Laser-induced shock and shear wave propagations have been observed in an epoxy resin, in the case of femtosecond laser irradiation. A specific time-resolved shadowgraphy ...
ECAULT, Romain; TOUCHARD, Fabienne; BERTHE, Laurent; BOUSTIE, Michel (Elsevier, 2020)The present work presents the latest development of laser shock adhesion test (LASAT) technology, targeting the weak bond detection in bonded aeronautic structures. This problematic is still holding back a wider use of ...
Numerical modeling of laser-induced shock experiments for the development of the adhesion test for bonded composite materials ECAULT, Romain; TOUCHARD, Fabienne; BOUSTIE, Michel; BERTHE, Laurent; DOMINGUEZ, Nicolas (Elsevier, 2016)In this work, laser shock experiments on composite material are modeled. Focus is made on the development of a reliable numerical model to be used for the laser shock wave adhesion test of bonded composites. Technique ...
ESCAULT, Romain; BOUSTIE, Michel; TOUCHARD, Fabienne; PONS, Frédéric; BERTHE, Laurent; CHOCINSKI-ARNAULT, Laurence; EHRHART, Bastien; BOCKENHEIMER, Clemens (Elsevier, 2013)A laser shock wave technique has been used to study the damage tolerance of T800/M21 CFRP (Carbon Fiber Reinforced Polymer) composite material with different lay_ups. Different levels of damage have been created according ...
Observation of the shock wave propagation induced by a high-power laser irradiation into an epoxy material ESCAULT, Romain; BERTHE, Laurent; BOUSTIE, Michel; TOUCHARD, Fabienne; LESCOUTE, Emilien; SOLLIER, Arnaud; MERCIER, Patrick; BERNIER, Jacky (IOP PUBLISHING, 2014)The propagation of laser-induced shock waves in a transparent epoxy sample is investigated by optical shadowgraphy. The shock waves are generated by a focused laser (3 ns pulse duration—1.2 to 3.4TWcm−2) producing pressure ...