Spallation and microjetting in laser-shock-loaded aluminium and gold

Issue		DYMAT 2009 Volume 1, 2009 DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		163 - 169
Section		Experimental Techniques
DOI		http://dx.doi.org/10.1051/dymat/2009022
Published online		15 September 2009

DYMAT 2009 (2009) 163-169
DOI: 10.1051/dymat/2009022

Spallation and microjetting in laser-shock-loaded aluminium and gold

E. Lescoute¹, T. De Rességuier¹, J.-M. Chevalier², M. Boustie¹, L. Berthe³ and J.-P. Cuq-Lelandais¹

¹ Laboratoire de Combustion et de Détonique, UPR 9028 CNRS, ENSMA, 1 Av. Clément Ader, 86961 Futuroscope Cedex, France
² CEA/CESTA, 15 Av. Sablières BP. 2, 33114 Le Barp, France
³ Laboratoire d'Application des Lasers de Puissance, UPR 1578 CNRS, 94114 Arcueil, France

Published online: 15 September 2009

Abstract
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 fragmentation and debris ejection in laser shock-loaded aluminium and gold, under both nanosecond and sub-picosecond laser pulses. Such fragmentation is mainly governed by two distinct processes: microjetting, that is ejection of thin jets upon shock breakout at the (rough) free surface, and spall fracture, which occurs 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 post-shock observations of recovered targets. They are compared to numerical computations performed with two hydrocodes, and a correct overall consistency is obtained.

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.