Experimental study on damage aftereffect of several types of metallic energetic fragments

Abstract

Metallic energetic fragments are the most widely used and technologically mature damage fragments at present. In this study, four types of typical tungsten/zirconium (W/Zr) energetic fragments are examined by static explosion test, and the penetration, hole enlargement, and ignition performance and characteristics of different fragment materials are investigated. The results show that all the four W/Zr energetic fragments have good anti-detonation and penetration capabilities, which can effectively penetrate 6 mm thick Q235 steel plate, aluminum spacer plate and fuel tank behind the target at impact velocity of 1050 m/s. 1#, 2# and 4# energetic fragments exhibit significant behind-target hole enlargement effect, and the enlarged area of holes in the aftereffect aluminum plate behind the steel plate with a spacing of 10 cm is 6~8 times the cross-sectional area of the original fragment, and the enlarged hole area of the fuel tank (outlet) behind the aluminum plate is 12~14 times the cross-sectional area of the original fragment. 3# fragments has weaker behind-target hole enlargement effect. Low-density 2# and 4# fragments can ignite the aviation kerosene tank behind the target, and 4# fragments show the best ignition effect. There is an internal consistency between hole enlargement capability on the aftereffect target of energetic fragments and the behind-target ignition capability. Without sacrificing the anti-detonation and penetration performance, low-density energetic fragments can be preferentially selected to ensure the behind-target damage effect.