Observation of the shock wave propagation induced by a high-power laser irradiation into an epoxy material
TypeArticles dans des revues avec comité de lecture
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 from 44 to 98.9 GPa. It is observed that the shock wave and the release wave created by the shock reverberation at the rear face are both followed by a dark zone in the pictures. This corresponds to the creation of a tensile zone resulting from the crossing on the loading axis of the release waves coming from the edge of the impact area (2D effects). After the laser shock experiment, the residual stresses in the targets are identified and quantified through a photoelasticimetry analysis of the recovered samples. This work results in a new set of original data which can be directly used to validate numerical models implemented to reproduce the behaviour of epoxy under extreme strain rate loading. The residual stresses observed prove that the high-pressure shocks can modify the pure epoxy properties, which could have an influence on the use made of these materials.
Showing items related by title, author, creator and subject.
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 ...
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 ...
Development of a laser shock adhesion test for the assessment of weak adhesive bonded CFRP structures EHRHART, Bastien; ECAULT, Romain; TOUCHARD, Fabienne; BOUSTIE, Michel; BERTHE, Laurent; BOCKENHEIMER, Clemens; VALESKE, Bernd (ELSEVIER, 2014)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 ...
TOUCHARD, Fabienne; BERTHE, Laurent; MALINOWSKI, Malinowski, Paweł H; OPOKA, Szymon; BOUSTIE, Michel; CHOCINSKI-ARNAULT, Laurence; OSTACHOWICZ, Wiesław M. (EDP Sciences, 2015)The high strain rate behaviour of the eco-composites, when submitted to laser impact loading, is not well known yet. Crucial questions are still open: influence of plant fiber length and distribution on the composite impact ...
MALINOWSKI, Paweł H.; SORRENTINO, Luigi; VASCONCELLOS, Davi Silva De; BERTHE, Laurent; GONZALEZ, Pedro Pascual; CHOCINSKI-ARNAULT, Laurence; BOUSTIE, Michel; TOUCHARD, Fabienne; OSTACHOWICZ, Wiesław M. (elsevier, 2018)Polymer composite materials provide good strength to weight ratio and tailored mechanical properties thanks to the reinforcing fibres. Until recently, the need for taking into account the whole life cycle of a composite ...