Numerical Study of Shaped Charge Jet Formation and Penetration into Multi-Layer with Different Liner Material

2010 ◽  
Vol 148-149 ◽  
pp. 744-748 ◽  
Author(s):  
Yan Long Kang ◽  
Jian Wei Jiang ◽  
Shu You Wang ◽  
Jian Bing Men
Keyword(s):  
Titanium Alloy ◽  
Mild Steel ◽  
Numerical Study ◽  
Hole Diameter ◽  
Shaped Charge ◽  
Jet Formation ◽  
Liner Material ◽  
Shaped Charge Jet ◽  
Tip Velocity ◽  
Good Agreement

This paper investigates the penetration performance of shaped charge against multi-layer target. A titanium alloy liner of shaped charge is proposed in order to obtain large perforated hole. Jet formation and penetrating into multi-layer target was calculated by hydro code AUTODYN. For different liner material include titanium alloy, mild steel and Cu, the explosion energy conversion, jet tip velocity and jet length, also the penetration performance are studied. It is found that the kinetic energy of jet is larger and the shape of jet is podgier when the liner material is titanium alloy, the perforated hole diameter on multi-layer improved 20% compare with the mild steel and Cu liner, the numerical simulation is good agreement to experimental results.

Numerical Simulation on Jet Formation of Shaped Charge with Different Liner Materials

2015 ◽  
Vol 65 (4) ◽  
pp. 279 ◽  
Author(s):  
Cheng Wang ◽  
Jianxu Ding ◽  
Haitao Zhao
Keyword(s):  
Shaped Charge ◽  
Wall Structure ◽  
Thin Wall ◽  
Jet Formation ◽  
Material Interfaces ◽  
Material Interface ◽  
Liner Material ◽  
Large Distortion ◽  
Shaped Charge Jet ◽  
Tip Velocity

<p>In this paper, the effect of liner material of the shaped charge on jet formation and its penetration capability is investigated by experimental and numerical methods. Liner materials investigated in this paper are copper, steel, and aluminium, respectively. Pulse X-ray photographic technology to shoot the formation of jet is employed to obtain the tip velocity and the diameter of jet. A two-dimensional multi-material code is designed to simulate the entire process from jet formation to penetrating a target. A markers on cell lines method is utilised to treat the multi-material interface. The results show that aluminium jet has the highest velocity with the poorest penetration capability. Copper jet has the strongest penetration capability with a velocity higher than that of steel jet, but lower than that of aluminium jet. The simulated results agree with the experimental results very well. It also indicates that the code developed can not only address large distortion problems but also track the variation of multi-material interfaces. It is favourable to simulate the explosive loading on thin-wall structure such as shaped charge. It is proved that authors’ method is feasible and reliable for optimising the structure of shaped charge jet to dramatically improve its tip velocity and penetration capability, and provides an important theoretic basis for designing high explosive anti-tank warhead.</p><p><strong>Defence Science Journal, Vol. 65, No. 4, July 2015, pp. 279-286, DOI: http://dx.doi.org/10.14429/dsj.65.8648</strong></p>

Autodyn-2D Simulation of Shaped Charge Jet Formation and Penetration Mechanism into Multi-Layered Shielded Target

2014 ◽  
Vol 664 ◽  
pp. 128-137
Author(s):  
Kamal Guendouz ◽  
Ayoub Sayhi ◽  
Wang Cheng
Keyword(s):  
Shell Thickness ◽  
Alpha Angle ◽  
Shaped Charge ◽  
Jet Formation ◽  
Liner Material ◽  
2D Simulation ◽  
Jet Breakup ◽  
Jet Penetration ◽  
Jet Velocity ◽  
Shaped Charge Jet

In this work, the shaped charge jet formation depends on different parameters which can has effect on jet behavior such as jet velocity, breakup and penetration. Jet radius or liner thickness, shell thickness, liner material density, α angle and stand-off distance are evaluated in purpose to investigate their effect on performance of shaped charge jet velocity and jet breakup phenomena, also we investigate the effect of stand-off distance on shaped charge jet penetration into steel target. We also studied the performance of some protective shields materials in order to assure more protection for vehicle structure against shaped charge jet penetration. For that, different materials were used as armors such as: kevlar epoxy, polyethylene, glass epoxy, steel-1006 and Al2O3 ceramic. These protective shields were evaluated in order to show their performance against shaped charge penetration into target. To do so, adopted explicit dynamic analyzing program Autodyn basing on finite element were used to simulate shaped charge jet formation and penetration. Autodyn-2D simulationshighlight the efficiency of our work comparing with the experiments done in literature and Birkhoff’s theory. In other terms, increasing in shell thickness, alpha angle and liner densityenhance jet breakup time, protective shields layered armor of steel-1006, steel 1006 with polyethylene and steel-1006 with Al2O3ceramic give more protection for structure against shaped charge jet penetration comparing with others armors.

Study of Shaped Charge Jet Penetration into Concrete Target

2011 ◽  
Vol 282-283 ◽  
pp. 650-653
Author(s):  
Zai Cheng Wang ◽  
Chun Lan Jiang ◽  
Ming Li
Keyword(s):  
Shaped Charge ◽  
Jet Formation ◽  
Jet Length ◽  
Simulation And Experiment ◽  
Jet Penetration ◽  
Shaped Charge Jet ◽  
Tip Velocity ◽  
Concrete Target

Based on the application of tandem weapon used to destroy concrete target this paper presents the results of simulation and experiment that investigate the penetration performance of shaped charge to runway. Jet formation and penetrating into multi-layer target was calculated by hydro code LS-DYNA3D. Jet tip velocity and jet length, also the penetration performance are studied. The damage performance of shaped charge is validated by experiment. The analysis demonstrates the shaped charge can create a big borehole for subsequent projectile to follow in.

scholarly journals Experimental and Numerical Study on the PG-7VM Warhead Performance against High-Hardness Armor Steel

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3020
Author(s):  
Paweł Żochowski ◽  
Radosław Warchoł ◽  
Maciej Miszczak ◽  
Marcin Nita ◽  
Zygmunt Pankowski ◽  
...  
Keyword(s):  
Numerical Model ◽  
Numerical Study ◽  
High Hardness ◽  
The Body ◽  
Shaped Charge ◽  
Steel Plates ◽  
Technical Documentation ◽  
Jet Formation ◽  
Depth Of Penetration ◽  
Shaped Charge Jet

Analyses presented in the article were carried out in order to characterize the main parameters of the shaped charge jet formed due to detonation of the PG-7VM warhead. As opposed to the previously published studies in which rolled homogeneous armored steel was mainly used as a target, in the current work the warhead penetration capability was determined against more contemporary high-hardness (500 HB) ARMSTAL 30PM steel armor with precisely determined mechanical properties. The research included experimental depth of penetration tests and their numerical reproduction in the LS-Dyna software. Special attention was paid to factors that could perturbate the shaped charge jet formation process and under- or overestimate its penetration capability. For this reason, warheads were X-ray inspected for structural discrepancies (voids or air inclusions in explosive, misalignment between the body, explosive, and liner, or lack of contact between the explosive and the liner) and properties of materials (explosive, targets, and most important warhead components) were analyzed before the experiments. The numerical model of the warhead was defined more accurately than in previously published studies, since it was based on the real grenade dimensions and its technical documentation. Thanks to this, the depth of penetration of the target made of ARMSTAL 30PM armored steel plates by the shaped charge jet formed from the PG-7VM warhead obtained by numerical simulation was consistent with the experimental results and equaled 278 mm and 280 mm, respectively. The difference between the experimental and numerical value was smaller than 1%, which confirms that the developed methodology of modeling allows users to properly reproduce the PG-7VM shaped charge jet formation and target penetration processes. A verified numerical model of the shaped charge jet penetration into a steel target was used to determine depth of penetration in function of stand-off distance for the PG-7VM warhead. A maximum depth of penetration of about 317 mm was obtained for the stand-off distance of 360 mm, which may indicate the potential direction of modernization of warheads.

Effect of liner material and explosive type on penetration effectiveness of shaped charge

2018 ◽  
Vol 233 (7) ◽  
pp. 1375-1383
Author(s):  
S Zaki ◽  
Emad Uddin ◽  
B Rashid ◽  
A Mubashar ◽  
Samiur R Shah
Keyword(s):  
Finite Element ◽  
Numerical Model ◽  
Element Model ◽  
Shaped Charge ◽  
Jet Formation ◽  
Liner Material ◽  
Numerical Finite Element ◽  
Underlying Mechanisms ◽  
Shaped Charge Jet ◽  
The Given

Shaped charges are used in many civilian and military applications. This study focuses on the effects of liner material and the type of explosive on the development of shaped charge jet. This was carried out by experimentation and numerical finite element-based modelling. Shaped charges were tested on a steel plate during the experimentation and the experimental data were used to validate the developed numerical model of the shaped charge. A hydrocode-based finite element model was able to predict the perforation and jet formation for the shaped charge, as well as the characteristics of the holes formed in the target plate. Several variations of the numerical model with the change of liner material and the filled explosive showed that the higher explosive resulted in higher velocity jet. The jet formation and velocity of jet were compared to determine the better performing combination of the material and explosive for the given shaped charge geometry. The underlying mechanisms were discussed in detail and compared with the previous studies.

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