The Fragmentation of Al-W Granular Composites Under Explosive Loading

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.

This is a preview of subscription content, access via your institution.

We’re sorry, something doesn't seem to be working properly.

Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

References

  1. 1.

    M.W. Beksted, Comb., Exp., and Shock Waves. 41, 533 (2005).

    Article  Google Scholar 

  2. 2.

    V.F Nesterenko, P.-H. Chiu, C. Braithwaite, A. Collins, D. Williamson, K.L. Olney, D.J. Benson, and F. McKenzie, AIP Conf. Proc. 1426, 533 (2012).

    CAS  Article  Google Scholar 

  3. 3.

    D.E. Grady, Fragmentation of Rings and Shells, The Legacy of N.F. Mott (Spinger, New York, 2006).

    Google Scholar 

  4. 4.

    K.L. Olney, P.-H. Chiu, C.-W. Lee, V.F. Nesterenko, and D.J. Benson, J. Appl. Phys. 110, 114908 (2011).

    Article  Google Scholar 

  5. 5.

    D.J. Benson, Comput. Methods Appl. Mech. Eng. 99, 235 (1992).

    Article  Google Scholar 

  6. 6.

    E. Vitali and D.J. Benson, Int. J. Numer. Methods Eng. 67, 1420 (2006).

    Article  Google Scholar 

  7. 7.

    G.R. Johnson and W.H. Cook, Eng. Fract. Mech. 21, 31 (1985).

    Article  Google Scholar 

  8. 8.

    K.L. Olney, V.F. Nesterenko, and D.J. Benson, Appl. Phys. Lett. 100, 191910 (2012).

    Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Karl L. Olney.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

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

Download citation