The Behavior of Shaped Charges with Open-Poled Hemispherical Liners
Final rept. Jan 1989-Jun 1990
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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This paper discusses the effect of an opening at the pole of a hemispherical shaped-charge liner. An experimental study was performed in which various diameter holes were made in otherwise similar shaped-charge liners. Flash radiographs were taken to observe changes in the liner collapse and the jet characteristics. The collapse process and jet characteristics of a hemispherical liner are significantly altered for a hole diameter which is 10 or more of the outer liner diameter. The jet tip velocity is increased by 26 for a hole diameter-to-liner diameter ratio of 0.25. Two explanations are presented for the behavior of the tip region of the shaped-charge jet. Both of the explanations assume that the pole of the liner impedes the motion of the subsequent liner material. Keywords Holes openings Shaped charges Hemispherical liners Flash radiography Conical liners.
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