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Medium Caliber Sabot for Efficient Use of Polymer Materials with Pressure Dependent Yield Strength

MICHAEL A. MINNICINO

Abstract


In kinetic energy projectiles, the buttress groove is conventionally used to transmit load between the long rod penetrator and the sabot during gun launch. The buttress groove geometry traditionally features a 7° driving flank angle but this angle can be varied to reduce the peak effective stress while increasing the peak hydrostatic or “pressure” stress along the groove root. Through modeling and simulation, it is shown that the increased pressure stress can be advantageously employed in combination with a sabot material that exhibits pressure dependent yield strength to survive gun launch.

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