Experiments and Simulations of Exploding Aluminum Wires: Validation of ALEGRA-MHD

Report No. ARL-TR-5299
Authors: Robert L. Doney, George B. Vunni, and John H. Niederhaus
Date/Pages: September 2010; 58 pages
Abstract: To perform armor simulations with quantifiable confidence, we need to validate material models by comparing a variety of computational data with carefully measured experiments. Exploding wires serve as excellent tests of material models since one can tune the energy deposition so that the wire passes through solid, liquid, and gas phases. The experimental data collected includes electrical measurements where material properties vary over a wide range of temperature, pressures, and electrical conductivities. In this work, we focus on aluminum wires immersed in a water environment. Our simulations show outstanding agreement with experiment when one factors in measurement uncertainty. We find great sensitivity with certain parameters, which lead to large variability in the results at late time.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2010