Ejection of spalled layers from laser shock-loaded metals

Dynamic fragmentation of shock-loaded metals is an issue of considerable importance for both basic science and a variety of technological applications, such as inertial confinement fusion, which involves high energy laser irradiation of thin metallic shells. In this context, we present an experiment...

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Bibliographic Details
Published in:Journal of applied physics 2010-11, Vol.108 (9), p.093510-093510-9
Main Authors: Lescoute, E., De Rességuier, T., Chevalier, J.-M., Loison, D., Cuq-Lelandais, J.-P., Boustie, M., Breil, J., Maire, P.-H., Schurtz, G.
Format: Article
Language:English
Subjects:
Engineering Sciences
Materials and structures in mechanics
Mechanics
Physics
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Summary:Dynamic fragmentation of shock-loaded metals is an issue of considerable importance for both basic science and a variety of technological applications, such as inertial confinement fusion, which involves high energy laser irradiation of thin metallic shells. In this context, we present an experimental and numerical study of debris ejection in laser shock-loaded metallic targets (aluminum, gold, and iron) where fragmentation is mainly governed by spall fracture occurring upon tensile loading due to wave interactions inside the sample. Experimental results consist of time-resolved velocity measurements, transverse optical shadowgraphy of ejected debris, and postshock observations of targets and fragments recovered within a transparent gel of low density. They are compared to numerical computations performed with a hydrodynamic code. A correct overall consistency is obtained.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3500317