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A study of composite material damage induced by laser shock waves

 
: Ecault, Romain; Boustie, Michel; Touchard, Fabienne; Pons, Frédéric; Berthe, Laurent; Chocinski-Arnault, Laurence; Ehrhart, Bastien; Bockenheimer, Clemens

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Composites. Part A, Applied science and manufacturing 53 (2013), S.54-64
ISSN: 1359-835X
European Commission EC
FP7-TRANSPORT; 266226; ENCOMB
Extended Nondestructive Testing of Composite Bonds
Englisch
Zeitschriftenaufsatz
Fraunhofer IZFP ()
layered structure; damage tolerance; delamination; optical microscopy

Abstract
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 to various laser irradiation conditions. Several characterization methods such as Optical Microscopy, X-ray Radiography, or Interferometric Confocal Microscopy have been used to quantify these defects. The nature of the defects induced by the shock wave propagation has been studied. The sensitivity of the composite material damage to the shock conditions has been shown and quantified. Moreover, the experimental results gathered with each technique have been compared to each other and it leads to a better understanding of the CFRP behavior under high dynamic loading. These original results have enabled the definition of a specific damage criterion for CFRP under dynamic loading.

: http://publica.fraunhofer.de/dokumente/N-254640.html