The Numerical Simulation of behind Armor Debris by Shaped Charge Jet Penetration

In order to study the aftereffect of the target plate penetrated by shaped charge jet , with the help of nonlinear dynamics solver AUTODYN, the SPH algorithm was adopted to simulate the whole process of jet penetrating the armor plate with different thickness under the condition of vertical. Results show that while the jet head perforating the plate, the behind armor debris (DAB) cloud will be formed, and the axis of symmetry of the "ellipsoid" is the jet direction. However, with the increase of target plate thickness, the behind armor debris number reduced, largest fragment emission angle also reduced.

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Lagrangian hydrocode simulations of rolled-homogeneous-armor plate perforation by a shaped charge jet

International Journal of Impact Engineering ◽

10.1016/0734-743x(94)90133-6 ◽

1994 ◽

Vol 15 (5) ◽

pp. 619-643 ◽

Cited By ~ 5

Author(s):

Martin N. Raftenberg

Keyword(s):

Shaped Charge ◽

Armor Plate ◽

Plate Perforation ◽

Shaped Charge Jet

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Study on Penetration Performance of Rear Shaped Charge Warhead

Materials ◽

10.3390/ma14216526 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6526

Author(s):

Yanan Du ◽

Guanglin He ◽

Yukuan Liu ◽

Zhaoxuan Guo ◽

Zenghui Qiao

Keyword(s):

Numerical Simulation ◽

Experimental Verification ◽

Simulation Method ◽

Shaped Charge ◽

Experimental Results ◽

Target Plate ◽

Depth Of Penetration ◽

Steel Target ◽

Shaped Charge Jet ◽

Control Cabin

In guided munitions, the shaped charge jet (SCJ) warhead is located behind the simulation compartment (including the control cabin, the steering gear cabin, and the guidance cabin). Therefore, the order of penetration of the SCJ is the simulation cabin and the target. To study the penetration performance of the SCJ to the target plate, the numerical simulation method is used to study the penetration performance of the designed warhead for the steel target at different standoffs, and the depth of penetration (DOP) at the best standoff is obtained, that is, the DOP of the steel target is about 128 mm. Additionally, the penetration performance of the SCJ warhead to target is studied by numerical simulation and experimental verification. Numerical simulation and experimental results show that the DOP of the SCJ warhead to the steel target is 50 mm without the simulation cabin, and about 30 mm with the simulation cabin. The results show that the penetration performance of SCJ is greatly weakened under the condition of non-optimal standoff, but the rear shaped charge warhead still has a strong penetration performance after completing the penetration of the simulated cabin.

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Ultrasonic Detection of Spall Damage Distribution Subjected to Plate Impact Test with Different Thickness

EPJ Web of Conferences ◽

10.1051/epjconf/201818302029 ◽

2018 ◽

Vol 183 ◽

pp. 02029

Author(s):

Naoya Nishimura ◽

Toshihiro Ito ◽

Takeru Watanabe

Keyword(s):

Tensile Stress ◽

Impact Test ◽

Plate Thickness ◽

Flyer Plate ◽

Plate Impact ◽

Target Plate ◽

Damage Distribution ◽

Spall Damage ◽

The Impact ◽

Different Thickness

Plate impact test on medium carbon steel were carried out to the target plate by impacting the flyer plate with one-third and two-thirds thickness of the target plate. The spall damage within the target plate was evaluated non-destructively with a low frequency scanning acoustic microscope as well as ultrasonic velocity and backscattering intensity. We observed the spall damage distribution by the B-and Cscan images. The distribution of spall damage through the plate thickness depends on the tensile stress area within the target plate. The difference of spall damage distribution was investigated by the plate impact test by flyer plate with different thickness. In the plate impact test by the flyer plate with 1/3 target plate thickness, the spall damage was generated by tensile stress area which superposed in the back surface side. On the other hand, in the case of 2/3 target plate thickness, the spall damage was detected at the impact surface side. By generating the spall damage in the different position through the target thickness, it will be possible to evaluate the accumulation of spall damage by reflection and transmission of the stress wave at the internal damage subjected to repeated impact.

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

World Journal of Engineering ◽

10.1108/wje-10-2021-0588 ◽

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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Numerical simulations of shaped charge jet penetration into concrete-like targets

International Journal of Protective Structures ◽

10.1177/2041419617706863 ◽

2017 ◽

Vol 8 (2) ◽

pp. 237-259 ◽

Cited By ~ 3

Author(s):

Feng Hu ◽

Hao Wu ◽

Qin Fang ◽

Jinchun Liu

Keyword(s):

Penetration Depth ◽

Constitutive Models ◽

Shaped Charge ◽

Standoff Distance ◽

Depth Of Penetration ◽

Whole Process ◽

Jet Penetration ◽

Metal Liner ◽

Shaped Charge Jet ◽

The Military

Shaped charge jet has been widely applied in the military and energy sources’ extraction fields; while the related investigations on the shaped charge jet penetration into concrete-like target are still limited, a series of numerical simulation works are conducted in this article. Holmquist–Johnson–Cook and Johnson–Cook models are used to describe the concrete-like targets and metal liner/casing of the shaped charge, respectively. The whole process including the formation, elongation in the air, and penetration into concrete-like target of shaped charge jet is reproduced using the multi-material arbitrary Lagrange–Euler algorithm and fluid–structure interaction method implemented in LS-DYNA. Simultaneously, the striking velocities of the jet (both tip and tail) and the damage of target (diameter and depth of penetration borehole) are derived. The above constitutive models, the corresponding material parameters, and the finite element algorithms are validated by comparing with the available tests’ data. The analyses of parametric influences are further performed. It indicates that for the unfragmented shaped charge jet, the penetration depth increases and the average penetration borehole diameter decreases with the standoff distance increasing, respectively; the compressive strength of concrete target has slight influence on the penetration depth of shaped charge jet; the diameter of shaped charge jet penetration borehole with aluminum liner is larger, while that with copper liner has a deeper penetration depth. It can also be found that the influence of explosive type on the penetration performance of shaped charge jet is negligible at small standoff distance, while the explosive LX-14 performs better than explosives Octol, B, and 8701 at larger standoff distance.

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