Experimental and numerical investigations of shock and shear wave propagation induced by femtosecond laser irradiation in epoxy resins

Romain Ecault (1) , Laurent Berthe (2) , Fabienne Touchard (1) , Michel Boustié (1) , Emilien Lescoute (3) , Arnaud Sollier (3) , Hubert Voillaume (4)

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]
2 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
3 DAM/DIF - DAM Île-de-France
4 Airbus Group Innovations [Suresnes]

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 setup has been developed using the photoelasticimetry principle to enhance the shear wave observation. Shear waves have been observed in epoxy resin after laser irradiation. Their propagation has been quantified in comparison with the main shock propagation. A discussion, hinging on numerical results, is finally given to improve understanding of the phenomenon.

Mots clés: femtosecond laser shock; epoxy resins; shear wave propagation; shadowgraphy; photoelasticimetry

Domaines: Matériaux; Mécanique [physics.med-ph]

Romain Ecault, Laurent Berthe, Fabienne Touchard, Michel Boustié, Emilien Lescoute, et al.. Experimental and numerical investigations of shock and shear wave propagation induced by femtosecond laser irradiation in epoxy resins. Journal of Physics D: Applied Physics, 2015, 48, pp.(9). ⟨10.1088/0022-3727/48/9/095501⟩. ⟨hal-01192697⟩