The Fragmentation of Al-W Granular Composites Under Explosive Loading

MRS Online Proceedings Library volume 1521, Article number: 807 (2013) Cite this article

Abstract

Small scale explosively driven fragmentation experiments have been performed on Aluminum (Al)-Tungsten (W) granular composite rings processed using cold isostatic compression of Al and W powders with a particle size of 4-30 microns. Fragments collected from the experiments had a maximum size of the order of a few hundred micrometers. This is a dramatic reduction in the fragment size when compared to the 1-10 mm typical for a homogeneous material such as solid aluminum under similar loading conditions. Numerical simulations of the experiment were performed to elucidate the mechanisms of fragmentation that were responsible for this shift in fragmentation size scales. Simulations were performed with a significantly stronger explosive driver to examine how the mechanisms of fragmentation change when the detonation pressure increases.

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Author information

Affiliations

  1. Department of Mechanical and Aerospace Engineering, University of California, San Diego, California, USA

    Karl L. Olney & Vitali F. Nesterenko

  2. Material Science and Engineering program, University of California, San Diego, California, USA

    Po-Hsun Chiu & Vitali F. Nesterenko

  3. Department of Structural Engineering, University of California, San Diego, California, USA

    David J. Benson

  4. Fracture and Shock Physics, SMF Group, Department of Physics, Cavendish Laboratory, Cambridge, CB3 0HE, United Kingdom

    Chris Braithwaite, Adam Collins & David Williamson

  5. Imperial College London, Institute of Shock Physics, South Kensington Campus, London, SW7 2AZ, United Kingdom

    Francesca McKenzie

Authors
  1. Karl L. Olney
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  2. Po-Hsun Chiu
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  3. Vitali F. Nesterenko
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  4. David J. Benson
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  5. Chris Braithwaite
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  6. Adam Collins
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  7. David Williamson
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  8. Francesca McKenzie
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Correspondence to Karl L. Olney.

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Olney, K.L., Chiu, PH., Nesterenko, V.F. et al. The Fragmentation of Al-W Granular Composites Under Explosive Loading. MRS Online Proceedings Library 1521, 807 (2013). https://doi.org/10.1557/opl.2013.114

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