Study on the penetration depth of ultra high speed penetration of tungsten rods into concrete targets

DOI:	10.11809/bqzbgcxb2023.07.013
Keywords:	ultra high speed penetration; depth of penetration; concrete targets; fluid penetration; rigid body penetration
Abstract:	In order to explore the variation of the penetration depth of ultra high speed penetration of tungsten rods into concrete targets with the muzzle velocity of the projectile, this paper uses a 125 mm gun to carry out penetration experiments of tungsten alloy rod projectiles on concrete, which verifies the rationality of the numerical simulation. LS DYNA finite element software is used to numerically simulate the ultra high speed penetration process, and further analyze the penetration process based on the numerical simulation results. The results show that: (1) In a velocity range of 0.2 km/s to 1.6 km/s, the erosion rate of the projectile mass has a linear relationship with the initial kinetic energy of the projectile. (2) The penetration depth first increases and then decreases with the increase of the muzzle velocity of the projectile, and there is a maximum penetration depth of about 80 times that of the bullet diameter near the area with a muzzle velocity of 1.2 km/s. The penetration depth under ultra high speed conditions has no advantages over medium and low speed penetration. (3) With the increase of the penetration speed, the penetration depth in the fluid penetration stage does not change much. However, it greatly reduces in the penetration stage of the rigid body so that the total penetration depth greatly reduces, resulting in the overall penetration curve showing a trend of first increasing and then decreasing.
Published:	2023-07-28
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