Experimental and numerical simulation study of tungsten ball oblique penetration through titanium alloy target

DOI:	10.11809/bqzbgcxb2023.11.020
Keywords:	target attitude; ballistic limit (V 50 ); influence law; size; equivalent thickness
Abstract:	The study of the influence of tungsten alloy fragments on the ballistic limit (V 50 ) of titanium alloy target (TC4) is of great significance for the power evaluation of warhead damage elements.The ballistic impact test is carried out to study the effect of impact angle on the ballistic limit (V 50 ) of 6 mm, 8 mm 93W tungsten ball penetrating 5 mm thick TC4 titanium alloy. Based on the agreement between the experimental results and the numerical simulation results, the effects of five typical sizes of tungsten balls on the penetration of titanium alloy target V 50 at an angle of 0°~75° are extended and analyzed.The results show that with the increase of the tungsten ball size, the V 50 decreases gradually, and the V 50 is less sensitive to the target angle, that is, the V 50 fluctuation range becomes smaller; With the increase of the target angle, the V 50 of the tungsten ball through the target increases slowly at a small impact angle(0°~45°), and the change rate of the ultimate penetration velocity at a large impact angle (45°~75°) increases exponentially, and the increasing rate becomes more obvious with the decrease of the tungsten ball size.Under the same ballistic limit, the variation trend of the ultimate penetration thickness of fragments into TC4 titanium alloy targets is basically the same, but the equivalent limit penetration thickness of fragments into TC4 targets under oblique penetration is obviously larger than that of TC4 targets with the same V 50 .The research conclusions can provide a reference basis for the power design of explosion killing warheads.
Issue:	Vol. 44 No. 11 (2023)
Published:	2023-11-28
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