Effect mechanism of tungsten alloy fragments on penetration depth of shaped charge

DOI:	10.11809/bqzbgcxb2023.04.004
Keywords:	numerical simulation; penetration depth; tungsten alloy fragment; velocity gradient
Abstract:	In order to study the influence mechanism of tungsten alloy fragments on penetration depth of shaped charge, this paper uses the AUTODYN finite element analysis software to simulate the influence of tungsten alloy fragments on the formation of shaped charge jet and the penetration depth of shaped charge, and carries out the experimental verification. The results indicate that the fragmentation placed in the accelerating charging section of the micro element of the charge cover will increase the velocity of a part of the jet, destroy the pre designed jet velocity gradient, lead to the accumulation or even fracture of the jet in the middle section, and reduce the penetration depth of the jet. When the penetration depth of the bare charge column reaches a high level, the more fragments lay in the accelerating charging section of the micro element of the charge cover, the more the penetration depth of the jet decreases. When the structure shape of the charge is a combination of cylinder and cone, the impact of the fragmentation on the penetration depth of the jet is small when the fragmentation is arranged in the inclined cone section of the charge column. The influence of the fragments on the depth of jet penetration can be effectively reduced by adding an inner layer with acoustic impedance much lower than that of the explosive between the charge column and the fragments.
Issue:	Vol. 44 No. 4 (2023)
Published:	2023-04-28
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