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Modeling of multi-edge effects in the case of laser shock loadings applied on thin foils: Application for material characterization of aluminum alloys

Article dans une revue avec comité de lecture
Author
AYAD, M.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
LAPOSTOLLE, L.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
RONDEPIERRE, A.
27438 THALES Airborne Systems [Elancourt]
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
LE BRAS, C.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
207488 AIRBUS Operations Ltd.
SCIUS-BERTRAND, M.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ÜNALDI, S.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
TRDAN, U.
302844 University of Ljubljana
ROUCHAUSSE, Y.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
GRASSY, J.
MAILLOT, T.
LAPOUJADE, V.
MICHEL, C.
BERTHE, L.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/22155
DOI
10.1063/5.0080326
Date
2022
Journal
Journal of Applied Physics

Abstract

This article presents the study of the shock wave propagation through aluminum alloys (pure aluminum and aluminum 2024-T3) produced by laser plasma using experimental and numerical tests. Water confinement regime interaction, pulse duration (7.2 ns), and power density (1-5 GW / cm 2) range correspond to laser shock peening process configuration and parameters. To that scope, we simulate the shock wave propagation using non-linear explicit code LS-DYNA, which we validate with experimental results. Thereupon, we present a descriptive analysis that links separately the material model and loading conditions to the dynamic response of aluminum alloys under high strain rate laser shock by coupling the Johnson-Cook (J-C) material model with the Grüneisen equation of state (MAT_015 and EOS_GRUNEISEN accordingly). In addition, we make use of stress propagation into target thickness to analyze the origin of different points on the Back Face Velocity (BFV) profile during shock propagation. Finally, we provide evidence that 2D compressive effects do not depend only on the focal spot size or target thickness such as the edge effects but also on power density and material initial yield strength.

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