Penetration of a Highly Oblique Steel Plate by a Thin Disk

Report No. ARL-TR-2828
Authors: Nathaniel Bruchey and Kent Kimsey
Date/Pages: September 2002; 21 pages
Abstract: Segmented rod penetrator concepts created interest in the ballistic performance of high-density, low length-to-diameter(L/D) ratio penetrators, but there was a lack of data showing the performance of such thin disks vs. high-obliquitytargets. An experimental and computational study was conducted to examine the basic case of a single tungsten heavyalloy disk with an L/D of 1/8 impacting a high-obliquity (65?) rolled homogeneous armor steel plate at a nominalvelocity of 2 km/s. The study provides valuable insight into the penetration process. Results include depths ofpenetration and penetration per unit length. Good agreement is seen between the experimental data and the CTHsimulation; both show a ricochet phenomenon. Results are also compared to comparable previous studies, and possibleexplanations for differences are given.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2002