High-velocity impact fragmentation of brittle, granular aluminum spheres

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Authors
Hooper, J.P.
Milby, C.L.
Lee, R.J.
Jouet, R.J.
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2013
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Abstract
We present ballistic and fragmentation data for brittle, granular aluminum spheres following high- velocity impact (0.5-2.0 km / s) on thin steel plates. These spheres, formed from isostatically pressed alu- minum powder, are representative of a wide variety of metallic reactive materials currently being studied. Simple analytic theories are introduced which provide a reasonable description of the residual velocity and hole diameter following impact. With increasing velocity there is an intriguing transition to a power-law fragment distribution, which we have interpreted as arising from extensive microbranching of fast-running cracks. The key equations of an analytic theory describing the fragment distributions are also presented.
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The article of record as published may be found at http://dx.doi.org/10.1016/j.proeng.2013.05.076
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Physics
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J. P. Hooper, C. L. Milby, R. J. Lee, and R. J. Jouet. “High-velocity impact fragmentation of brittle, granular aluminum spheres. “Proc. Eng. 58, 663 (2013).
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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