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Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (4): 748-757.doi: 10.12382/bgxb.2021.0225

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Jet Formation and Penetration of Shaped Charge with Isosceles Trapezoidal Cross-section

WANG Yuting, HUANG Zhengxiang, ZU Xudong, MA Bin, XIAO Qiangqiang, JIA Xin   

  1. (School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094,Jiangsu,China)
  • Online:2022-03-17

Abstract: The jet formation of shaped charge with isosceles trapezoidal cross-section and its penetration characteristics are studied through pulsed X-ray photography and depth of penetration tests. The jet formation is simulated by using ANSYS/LSDYNA finite element software,and the influence of the inscribed circle size on jet formation is studied when other parameters are fixed. The results show that the shaped charge with isosceles trapezoidal cross-section forms a jet with lateral velocity,and the lateral velocity has a gradient distribution. Except for the jet head,the rest of jet is cohesionless at the late stage of stretching. The non-condensed part of jet consists of two fluids with different lateral velocities and different sizes. The penetration ability of jet is reduced due to its lateral velocity. The non-condensation phenomenon of jet disappears when the inscribed circle diameter of charge cross-section increases to 67.2 mm (being 1.2 times of 56 mm),and the jet does not have an obvious lateral velocity when the inscribed circle diameter of charge cross-section increases to 84 mm (being 1.5 times of 56 mm).

Key words: shapedcharge, jetformation, penetration, isoscelestrapezoidalcross-section

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