A limit of validity of the straight line hypothesis in shaped charge jet formation modeling

1997 ◽  
Vol 82 (1) ◽  
pp. 107-111 ◽  
Author(s):  
J. P. Curtis ◽  
R. J. Kelly
Keyword(s):  
Shaped Charge ◽  
Jet Formation ◽  
Straight Line ◽  
Shaped Charge Jet

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.

Towards a Better Understanding of Shaped Charge Jet Formation and Penetration

2019 ◽  
Author(s):  
David W. Price ◽  
Ernest J. Harris ◽  
Frances G. Daykin
Keyword(s):  
Phase 1 ◽  
3D Modelling ◽  
The Body ◽  
Shaped Charge ◽  
Device Design ◽  
Jet Formation ◽  
Shaped Charge Jet ◽  
2D And 3D ◽  
Data Reproducibility ◽  
Technology Demonstrator

Abstract JeMMA, a set of relatively simple shaped-charge devices, has been designed in order to generate suitable data on jet formation, break-up and penetration for code validation purposes. The JeMMA Phase 1 device incorporated a copper liner and six of these shaped charges were manufactured as a technology demonstrator and fired in a special shaped charge facility in December 2016. The radiographic results obtained from the JeMMA Phase 1 and 2 devices, along with data reproducibility between trials, was excellent. This report gives an overview of the Phase 1 and 2 trials, including device design, the results of the firings conducted in Switzerland and details of the subsequent 2D and 3D hydrocode modelling carried out at AWE. The agreement between the data and both 2D and 3D modelling of the experiments is very pleasing, but highlights where further work is required. These JeMMA experiments will enhance the body of relevant data required to provide the validation of the hydrocode materials and modelling methodologies and enable us to better model the jetting threats of our experiments and have higher confidence in the results of the modelling.

Instability of a Conical Liner during Shaped-Charge Jet Formation

2019 ◽  
Vol 55 (4) ◽  
pp. 434-438 ◽  
Author(s):  
V. V. Pai ◽  
V. M. Titov ◽  
Ya. L. Luk’yanov ◽  
A. V. Plastinin
Keyword(s):  
Shaped Charge ◽  
Jet Formation ◽  
Shaped Charge Jet

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 Kinematics of the shaped charge jet formation process

2020 ◽  
Vol 1666 ◽  
pp. 012017
Author(s):  
E M Grif ◽  
A V Guskov ◽  
K E Milevskii
Keyword(s):  
Formation Process ◽  
Shaped Charge ◽  
Jet Formation ◽  
Shaped Charge Jet

Effect of fragment impact on shaped charge jet formation and penetration into steel target

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hakan Hafizoglu ◽  
Huseyin Emrah Konokman ◽  
Latif Kesemen ◽  
Ali Kursat Atay
Keyword(s):  
Penetration Depth ◽  
Symmetry Axis ◽  
Impact Angle ◽  
Shaped Charge ◽  
Steel Plates ◽  
Jet Formation ◽  
Target Plate ◽  
Content Type ◽  
Simulation Results ◽  
Shaped Charge Jet

Purpose This paper aims to investigate the effects of fragment impacts to shaped charge warheads in terms of shaped charge jet formation geometries and penetration performances. Design/methodology/approach In experimental process, a fragment was accelerated to a shaped charge warhead by means of a powder gun to a velocity more than 1,000 m/s, and this impact led to conical damage in the explosive of the warhead. Deformation on the warhead was visualized using X-ray technique to observe holes generated during fragment impact. Penetration test was performed against AISI 1040 steel plates with the damaged shaped charge warhead. Penetration performance of shaped charge jet, which deviated from the symmetry axis, was simulated by using SPEED software with 3-D Eulerian method to validate the numerical modelling method by comparing penetration test and simulation results of damaged warhead. Findings Simulation and test results showed good correlation for the warhead in terms of penetration depth and hole geometry at the impact surface of steel plates. In addition, the effects of the numbers and the geometries of fragment holes on shaped charge jet penetration performances were investigated with validated numerical methods. Simulation results showed that the increase in the number of fragment holes in the explosive of the warhead led to particulation of shaped charge jet that diminished penetration depth in the target plate. Additionally, simulation results also showed that the fragment hole geometry in the explosive after different fragment impact angles affected the amount of jet deviation from the symmetry axis as well as penetration depth in the target plate. Practical implications The results obtained from the current study revealed that fragment impact angle and different number of fragment impact reduced the penetration performance of shaped charge warhead by influencing the symmetry of shaped charge jet negatively. Originality/value The current study fulfils the need to investigate how fragment impact on the shaped charge warhead affect the formation symmetry of shaped charge jet as well as penetration performance by experimental and numerical methods. Penetration performance result of asymmetric jet is compared by experimental and numerical studies. A detailed methodology on numerically modelling of the effect of fragment impact angle and number of fragment impact on shaped charge jet performance is given in this study.

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