Numerical Analysis of Shaped Charge Bimetallic Liners Effects on Diameter and Depth of Penetration into Steel Targets

Document Type : Solid Mechanics

Authors

1 azad olom tahghighat

2 tarbiat modarres

3 malek ashtar

Abstract

One of the main important components which are used in the shaped charges is liner that its material has a considerable influence on the jet formation and penetration profile. In recent years, researches have focused on the analysis of the effect of bimetallic liners and their effective behavior. In this paper, at the first step, the process of jet formation and the penetration in the steel target is numerically simulated for a shaped charge with copper liner using the Ansys-Autodyn software. Analytical solutions have been done using generalized PER theory for jet formation and hydrodynamics theory for penetration; as well the experimental tests were performed with copper liner. The comparison of penetration profiles obtained from numerical, experimental and analytical methods showed a good agreement. Then, the validated numerical simulations were developed for two single-metal liners of nickel and aluminum, and two bimetallic copper-nickels, and copper-aluminum liners. Also, the results of jet tip velocity, penetration depth and crater diameter have been compared between single and bimetallic liners. Regarding to jet formation and penetration in steel target, the comparison between single and bimetallic liners results shows that the using bimetallic liners, improve crater diameter and depth of penetration simultaneously.
  
of the main important components which are used in the shaped charges is liner that its material has a considerable influence on the jet formation and penetration profile. In recent years, researches have focused on the analysis of the effect of bimetallic liners and their effective behavior. In this paper, at the first step, the process of jet formation and the penetration in the steel target is numerically simulated for a shaped charge with copper liner using the Ansys-Autodyn software. Analytical solutions have been done using generalized PER theory for jet formation and hydrodynamics theory for penetration; as well the experimental tests were performed with copper liner. The comparison of penetration profiles obtained from numerical, experimental and analytical methods showed a good agreement. Then, the validated numerical simulations were developed for two single-metal liners of nickel and aluminum, and two bimetallic copper-nickels, and copper-aluminum liners. Also, the results of jet tip velocity, penetration depth and crater diameter have been compared between single and bimetallic liners. Regarding to jet formation and penetration in steel target, the comparison between single and bimetallic liners results shows that the using bimetallic liners, improve crater diameter and depth of penetration simultaneously.
 
حلیل عددی تأثیر خرج گود با آستری دوجنسی بر قطر حفره و عمق نفوذ در اهداف فولادی
 

Keywords

References

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History

  • Receive Date: 05 May 2018
  • Accept Date: 09 October 2018
  • Publish Date: 22 November 2019

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