Open Access

ARTICLE

Experimental and Numerical Study of Dynamic Fragmentation in Laser Shock-Loaded Gold and Aluminium Targets

E. Lescoute¹, T. De Rességuier¹, J.-M. Chevalier², J. Breil³, P.-H. Maire², G. Schurtz³

1 Institut PPRIME, UPR 3346, CNRS, ENSMA, Université de Poitiers, 1 av. Clément Ader, 86961Futuroscope Cedex, France
2 CEA - CESTA, BP 2 - 33114 Le Barp Cedex - France
3 CELIA - CEA/CNRS/Université Bordeaux I - 351 Cours de la Libération - 33405 Talence Cedex- France

Computers, Materials & Continua 2011, 22(3), 219-238. https://doi.org/10.3970/cmc.2011.022.219

Abstract

With the ongoing development of high energy laser facilities designed to achieve inertial confinement fusion, the ability to simulate debris ejection from metallic shells subjected to intense laser irradiation has become a key issue. We present an experimental and numerical study of fragmentation processes generating high velocity ejecta from laser shock-loaded metallic targets (aluminium and gold). Optical transverse shadowgraphy is used to observe and analyze dynamic fragmentation and debris ejection. Experimental results are compared to computations involving a fragmentation model based on a probabilistic description of material tensile strength. A correct overall consistency is obtained.

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Keywords

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