Velocity threshold of shock initiation of shielded composition B impacted by typical fragments

DOI:	10.11809/bqzbgcxb2023.04.003
Keywords:	tungsten alloy fragment; energetic fragment; shock initiation; shielded composition B; velocity threshold
Abstract:	This paper carries out a ballistic gun experiment to obtain the velocity threshold which is required for shock initiation of shielded composition B impacted by tungsten alloy fragments, PTFE based energetic fragments and Zr based amorphous alloy energetic fragments. The result shows that, under the specific target conditions of the experiment, the initiation velocity thresholds of the above three types of fragments are 1 957 m/s, 1 717 m/s and 1 680 m/s respectively. Both types of the energetic fragments can produce enhanced initiation effect, in which the Zr based energetic fragments have a stronger initiation ability. The key parameters in the calculation model of the velocity thresholds are calibrated. The proportion of kinetic and chemical energy in the terminal damage process of the energetic fragments is also decoupled. The conclusion can provide guidance for fragment selection and power design of lethal warheads.
Issue:	Vol. 44 No. 4 (2023)
Published:	2023-04-28
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