Journal articles: 'Shaped charge'

1

Racah, E. "Shaped Charge Jet Heating." Propellants, Explosives, Pyrotechnics 13, no. 6 (December 1988): 178–82. http://dx.doi.org/10.1002/prep.19880130605.

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2

Markelov, G. E. "Effect of initial heating of shaped charge liners on shaped charge pentetration." Journal of Applied Mechanics and Technical Physics 41, no. 5 (September 2000): 788–91. http://dx.doi.org/10.1007/bf02468723.

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3

Hristov, Hristo. "Modeling in Shaped Charge Design." Information & Security: An International Journal 12 (2003): 225–31. http://dx.doi.org/10.11610/isij.1213.

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4

Me-Bar, Yoav, and Yehuda Partom. "Shaped Charge Jet Tail Velocity." Propellants, Explosives, Pyrotechnics 22, no. 6 (December 1997): 355–59. http://dx.doi.org/10.1002/prep.19970220611.

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5

Liu, Yakun, Jianping Yin, Zhijun Wang, Xuepeng Zhang, and Guangjian Bi. "The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper." Materials 13, no. 20 (October 12, 2020): 4519. http://dx.doi.org/10.3390/ma13204519.

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Detonation waves will bypass a wave shaper and propagate in the form of a horn wave in shaped charge. Horn waves can reduce the incidence angle of a detonation wave on a liner surface and collide with each other at the charge axis to form overdriven detonation. Detection electronic components of small-caliber terminal sensitive projectile that are limited by space are often placed inside a wave shaper, which will cause the wave shaper to no longer be uniform and dense, and weaken the ability to adjust detonation waves. In this article, we design a double-layer shaped charge (DLSC) with a high-detonation-velocity explosive in the outer layer and low-detonation-velocity explosive in the inner layer. Numerical and experimental simulation are combined to compare and analyze the forming process and penetration performance of explosively formed projectile (EFP) in DLSC and ordinary shaped charge (OSC). The results show that, compared with OSC, DLSC can also adjust and optimize the shape of the detonation wave when the wave shaper performance is poor. DLSC can obtain long rod EFPs with a large length-diameter ratio, which greatly improves the penetration performance of EFP.

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6

Zaki, S., Emad Uddin, B. Rashid, A. Mubashar, and Samiur R. Shah. "Effect of liner material and explosive type on penetration effectiveness of shaped charge." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 7 (January 10, 2018): 1375–83. http://dx.doi.org/10.1177/1464420717753233.

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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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Qu, Hong Fei, Feng Han, and Fang Chen. "The Numerical Simulation of Shaped Charge Jet under the Influence of Charge Structure." Applied Mechanics and Materials 444-445 (October 2013): 996–1000. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.996.

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In this article, through numerical simulation mechanic we investigated that charge structure, exploiting distinct radial detonation velocity explosives, has a remarkable influence on the forming process of shaped charge jet. Based on the numerical computational results, the contribution of charge proportion and filling mode to the shape and velocity of shaped charge jet are mainly analyzed, aiming to identify the best charge proportion. It is demonstrated from numerical experiments that, sub-munitions power is significantly enhanced premised on invariable size of sub-munitions. And this observation can be adopted to design of the warhead arrayed in net in the future.

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8

THANG, Dam, Vladimir BELIN, and Tran DOANH. "STUDIES OF THE SHAPED CHARGES EFFECT WITH A HEMISPHERICAL ECCENTRIC SHAPE RECESS FOR THE ROCKS DESTRUCTION." Sustainable Development of Mountain Territories 13, no. 2 (June 30, 2021): 281–91. http://dx.doi.org/10.21177/1998-4502-2021-13-2-281-291.

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The method of outdoor installation of explosive charges is usually used in the destruction of rocks in conditions in which the method of drilling and blasting using borehole or borehole charges is difficult to apply due to objective conditions. The productivity of rock destruction by the outdoor installation of a concentrated charge is very low. This is due to the fact that such an explosion is characterized by a large loss of energy in the environment. The destruction of rocks by an explosion using shaped charges (CW) to destroy the rock is one solution to increase the useful energy of the destruction of the rock compared to charges placed outside. To achieve the optimal effect of destruction of the rock by cumulative charges, it is necessary to, so that for each type of rock, a specific type of shaped charges can be determined with the appropriate performance and efficiency of the use of explosives. The stronger the rock, the more efficient the short-circuit should be, and vice versa. Thus, for effective rock crushing, it is necessary to develop and produce a number of different types of shaped charges. The use of shaped explosive charges allows you to increase the utilization rate of the useful energy of the explosion and increase the destruction zone of the rock. At a fixed mass of the explosive, the destructive effect of the explosive charge placed on the surface of the rock, it depends on the shape of the charge and the geometric parameters of the charge. Shaped charges with an eccentric hemispherical shape have a coefficient of use of the useful energy of the explosion for the destruction of rock, more than 2.4 times compared to conventional concentrated charges of the same mass.

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9

Habera, Łukasz, and Kamil Hebda. "Badania porównawcze liniowych ładunków kumulacyjnych." Nafta-Gaz 77, no. 6 (June 2021): 366–75. http://dx.doi.org/10.18668/ng.2021.06.02.

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The fireground tests are the best method for verifying the operation effectiveness of the entire shooting device or its component parts in real conditions. The purpose of the fireground tests presented herein was the physical verification of linear shaped charge (LSC) ability to perforate multi-layered target, reflecting the material and geometrical conditions of a borehole. The series of shooting tests included tests of three types of linear shaped charges selected for use in perfo-fracturing devices. The following shaped charges were tested: LSC in lead enclosure, having φ = 40 mm circular cross-section with shaped recess; LSC with copper liner in 20/30 mm steel trapezoid enclosure; LSC with liner made of solid copper, in 20/40 mm steel trapezoidal enclosure.During testing, the cumulative jet velocity was recorded using voltage type probes, arranged between the individual layers of a target composed of steel and concrete materials. The research method adapted for the project purposes was aimed at verification of the following thesis: whether the proposed shaped charges fulfil the technical and performance conditions for their effective application in the oil industry. The criterion adopted was the ability – or lack of ability – to perforate the multi-layered barrier in the form of two steel plates and concrete casting. The testing stand, single-use by its nature, was each time composed of concrete block having 400 mm ´ 250 mm ´ 150 mm dimensions and 20 MPa static compressive strength, on which two steel plates were placed parallel to each other with 20 mm spacing. The thickness of the plates was 5 mm and 10 mm respectively. The tested shaped charge was placed on the top steel plate at a distance of one calibre – that is the distance equal to the opening of the trapezoidal shaped charge and full diameter of circular cross-section charge. Furthermore, within media interface planes (steel/air, air/steel; steel/concrete), the set of voltage-type measuring probes was installed, in the form of single electric wires (φ = 0.25 mm). At an instant when they break (circuit break) as a result of cumulative jet operation, voltage drop in the subsequent measuring probes will act as a logical gate of start-stop type, or in other words the zero-one (0–1) type gate. The readings of individual probes breakage times allowed in addition to determine the velocity of the cumulative jet and to estimate its braking dynamics while passing through the subsequent elements of multi-layered target.

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10

Hebda, Kamil, Łukasz Habera, and Piotr Koślik. "Modelowanie numeryczne ładunków kumulacyjnych z wkładkami dzielonymi dwuczęściowymi." Nafta-Gaz 77, no. 4 (April 2021): 264–69. http://dx.doi.org/10.18668/ng.2021.04.06.

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The article was created on the grounds of numerical modelling of shaped charges with a focus on the unconventional shape of their liners. The standard shaped charge of the “deep penetrating” type is equipped with a conical liner made of copper. Three various geometries of shaped charges featuring unconventional shape have been modelled and compared with the classical model of a shaped charge. The shaped charges have been compared for maximum pressure during detonation, cumulative jet velocity, kinetic energy gained and length of cumulative jet after 22 µs. The purpose of modelling shaped charges, featuring unconventionally formed liners, was to check whether they are able to improve the perforation job parameters in oil and gas wells. Perforation of the borehole is a critical job, enabling the initiation of hydrocarbons production from a specific reservoir. The job consists in making series of channels perpendicular to the borehole axis, penetrating casing walls, the cement layer and the formation rock, in order to create a hydraulic link between the borehole and the reservoir of hydrocarbons. In the oil industry, the “deep penetrating” type shaped charges are designed in order to provide optimal length of the perforation channel, while maintaining its adequate perforating diameter. Nowadays, the most commonly deep-penetrating shaped charges used, are the axially-symmetric shaped charges with conical liners made of copper powders. The charges create a cumulative jet reaching a velocity of approx. 7000 m/sec and are able to penetrate up to 1 m of rock matrix in favourable conditions. The article describes the parameters of shaped charges, that have been obtained as a result of numerical modelling. In order to finally confirm the target penetrating ability by the modelled shaped charges, one should check their real physical models in fire-ground conditions.

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11

Hornemann, U., and A. Holzwarth. "Shaped charge penetration in alumina targets." International Journal of Impact Engineering 20, no. 1-5 (January 1997): 375–86. http://dx.doi.org/10.1016/s0734-743x(97)87508-2.

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12

Chuan, Yu, Tong Yanjin, Yan Chengli, Li Fabo, Gui Yulin, Zhang Ming, Wang Bingren, Xie Panhai, and Li Liangzong. "Applied research of shaped charge technology." International Journal of Impact Engineering 23, no. 1 (December 1999): 981–88. http://dx.doi.org/10.1016/s0734-743x(99)00140-2.

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13

Y., Mohamed, Riad M., and Kresha Y. "MODELING OF SHAPED CHARGE JET FORMATION." International Conference on Aerospace Sciences and Aviation Technology 9, ASAT CONFERENCE (May 1, 2001): 1–13. http://dx.doi.org/10.21608/asat.2001.24795.

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14

Held, Manfred. "Glass Armour and Shaped Charge Jets." Propellants, Explosives, Pyrotechnics 23, no. 2 (April 1998): 105–10. http://dx.doi.org/10.1002/(sici)1521-4087(199804)23:2<105::aid-prep105>3.0.co;2-7.

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15

Chou, P. C., and W. J. Flis. "Recent Developments in Shaped Charge Technology." Propellants, Explosives, Pyrotechnics 11, no. 4 (August 1986): 99–114. http://dx.doi.org/10.1002/prep.19860110402.

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16

Held, Manfred. "Shaped Charge Optimization against ERA Targets." Propellants, Explosives, Pyrotechnics 30, no. 3 (June 2005): 216–23. http://dx.doi.org/10.1002/prep.200500009.

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17

Held, Manfred. "Shaped Charge Optimisation against Bulging Targets." Propellants, Explosives, Pyrotechnics 30, no. 5 (October 2005): 363–68. http://dx.doi.org/10.1002/prep.200500027.

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18

Malygin, A. V., E. V. Proskuryakov, M. V. Sorokin, and V. M. Fomin. "Shaped charge with an axial channel." Journal of Applied Mechanics and Technical Physics 52, no. 3 (May 2011): 347–51. http://dx.doi.org/10.1134/s0021894411030035.

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19

Proskuryakov, E. V., M. V. Sorokin, and V. M. Fomin. "Rebounding of a shaped-charge jet." Journal of Applied Mechanics and Technical Physics 48, no. 5 (September 2007): 633–35. http://dx.doi.org/10.1007/s10808-007-0080-1.

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20

Malygin, A. V., M. V. Sorokin, V. M. Fomin, and V. V. Yurchenko. "Cutoff of a shaped-charge jet." Journal of Applied Mechanics and Technical Physics 50, no. 5 (September 2009): 911–14. http://dx.doi.org/10.1007/s10808-009-0123-x.

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21

Yavuz, M. Sarper, and R. Orhan Yildirim. "Simulations on concrete penetration of shaped charges." Journal of Defense Modeling and Simulation: Applications, Methodology, Technology 9, no. 4 (June 28, 2011): 321–26. http://dx.doi.org/10.1177/1548512911410757.

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In this paper, the effects of the use of various aluminium materials as liner material in shaped charges for the perforation of concrete slabs are examined with numerical simulations. Using AUTODYN-2D software, formation of the shaped charge jets for seven different aluminium materials are modelled first and then these jets are directed to 35 MPa compressive strength concrete slabs. Those analyses are performed for a constant liner thickness which corresponds to 8% of the shaped charge diameter. Furthermore, the effect of standoff on the penetration of concrete slabs is examined by using shaped charges with the same geometry and liner material (7075-T6). The cone angle of the shaped charge is taken as 100°.

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22

Nurmukhametov, A. T., A. G. Popov, and D. A. Demoretsky. "Design Optimization of Small Shaped Charges with the Use of Complex Casing." Applied Mechanics and Materials 698 (December 2014): 566–69. http://dx.doi.org/10.4028/www.scientific.net/amm.698.566.

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A new design of shaped charges with a complex cumulative casing was proposed. The casing consists of two parts: conical and spherical. Mathematical modeling is conducted to determine the optimum shape of the cumulative casing. The feasibility of increasing the inlet area formed at detonation of the proposed shaped charge up to 2.8 times has been demonstrated.

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23

Chen, Bing, Gang Yu, Xu Guo Zhou, Yi Hua Dou, Zhong Ren Qu, and Ming Fei Li. "The Research of Applied Analysis Method on Shaped Charge Detonation Parameters." Applied Mechanics and Materials 678 (October 2014): 666–71. http://dx.doi.org/10.4028/www.scientific.net/amm.678.666.

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For avoid the perforation accident, oil perforating urgent need to calculate accurately shaped charge detonation parameters to guide the design and construction of perforation. According to the charge type and characteristics of shaped charge, based on traditional detonation theory and detonation parameters calculated method, this paper first determining shaped explosive detonation reaction equation, then analysis the shaped charge detonation heat, detonation temperature, detonation tolerance and detonation pressure and detonating velocity, extract the analytical methods of shaped charges detonation parameters suitable for oil at last. The specific practices: determined the reaction equation of shaped charges explosive with a maximum heat release rule; determined detonation heat, detonation temperature and detonation tolerance with law of Hess, internal energy value method and Avogadro law; calculated detonation velocity and pressure by Kamlet law; use engineering calculation method to analyze the detonating velocity as to the non-C-H-N-O composition shaped charges which containing feeling agent, bonding agent, flammable agent, plasticizer and other active agent; by revision Kamlet formula, get detonation pressure calculation formula.

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24

Bassim, M. Nabil, S. Boakye-Yiadom, and Manon Bolduc. "Microstructural Evolution from Shaped Charge through Steel Plates." Applied Mechanics and Materials 566 (June 2014): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amm.566.344.

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A set of 18 armour steel plates were stacked on top of each other and subjected to shape charges that went through the plates and created a hole that decreased in diameter as it went through consecutive plates. Afterwards, the plates were examined and the hardness near the hole and away from the hole was taken to determine the effect of the passing of the shaped charge through the plates. Also, specimens from the walls of the holes were taken to determine changes in the microstructure due to the shock wave and the resulting excessive heating from the shape charge. It was observed that the shock wave produced significant changes in the microstructure resulting in the appearance adiabatic shear bands (ASBs). These ASBs persisted in holes in plates placed further down the stack (up to 8thin the stack). More complex microstructural mechanisms are thought to take place as opposed to erosion from the flow of the molten metal through the holes in the plates.

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25

Naeem, K., A. Hussain, and S. Abbas. "A Review of Shaped Charge Variables for its Optimum Performance." Engineering, Technology & Applied Science Research 9, no. 6 (December 1, 2019): 4917–24. http://dx.doi.org/10.48084/etasr.3153.

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Shaped charge is a device for focusing the chemical energy of explosives to a particular point or line for penetration or cutting purpose respectively. They are used for the penetration or cutting of various types of targets on land, water, underground, underwater, or air. Their shape is either conical or linear and consists of explosive, casing and liner. The liner is bent towards the central axis producing a thin hypervelocity jet by the energy released as a result of the explosive detonation. This jet is utilized against the target. Shaped charges can perforate or penetrate targets like aircrafts, ships, submarines, armored vehicles, battle tanks, and bunkers. This paper presents a detailed review of analytical works, computer simulations, and experimental results related to the liner. Among modern diagnostic techniques flash x-rays, radiography is most used in the experiments performed in the last 40 years. Powder metallurgy, which started in the late twentieth century raised the efficiency of shaped charges to new altitudes. The efficiency of the shaped charge depends on numerous factors such as explosive’s type, liner’s material, geometry and metallurgy, manufacturing technique, and casing thickness. Factors concerning the liner’s material, metallurgical advancements, and geometry are discussed chronologically and in detail.

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26

Hristov, H. "CAUCHY PROBLEM FOR SHAPED CHARGE DESIGN OPTIMIZATION." International Conference on Applied Mechanics and Mechanical Engineering 15, no. 15 (May 1, 2012): 1–9. http://dx.doi.org/10.21608/amme.2012.36906.

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27

Jaramaz, Slobodan, Dejan Micković, Predrag Elek, Dragana Jaramaz, and Dušan Micković. "A Model for Shaped Charge Warhead Design." Strojniški vestnik – Journal of Mechanical Engineering 58, no. 6 (June 15, 2012): 403–10. http://dx.doi.org/10.5545/sv-jme.2012.335.

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28

Cornish, R., J. T. Mills, J. P. Curtis, and D. Finch. "Degradation mechanisms in shaped charge jet penetration." International Journal of Impact Engineering 26, no. 1-10 (December 2001): 105–14. http://dx.doi.org/10.1016/s0734-743x(01)00072-0.

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29

Saran, Salih, Oğuzhan Ayısıt, and Mehmet Sarper Yavuz. "Experimental Investigations on Aluminum Shaped Charge Liners." Procedia Engineering 58 (2013): 479–86. http://dx.doi.org/10.1016/j.proeng.2013.05.055.

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30

Bellamy, Ronald F. "A Shaped Charge Warhead Versus a Tank." Military Medicine 153, no. 5 (May 1, 1988): 245–47. http://dx.doi.org/10.1093/milmed/153.5.245.

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31

Held, M. "Penetration Cutoff Velocities of Shaped Charge Jets." Propellants, Explosives, Pyrotechnics 13, no. 4 (August 1988): 111–19. http://dx.doi.org/10.1002/prep.19880130405.

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32

Elshenawy, T., and Qing Ming Li. "Breakup Time of Zirconium Shaped Charge Jet." Propellants, Explosives, Pyrotechnics 38, no. 5 (April 15, 2013): 703–8. http://dx.doi.org/10.1002/prep.201200191.

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33

Rassokha, S. S., S. V. Ladov, and A. V. Babkin. "Rotational Motion of Fluted Shaped-Charge Liners." Journal of Applied Mechanics and Technical Physics 60, no. 4 (July 2019): 608–11. http://dx.doi.org/10.1134/s0021894419040023.

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34

Curtis, J. P. "Axisymmetric instability model for shaped charge jets." Journal of Applied Physics 61, no. 11 (June 1987): 4978–85. http://dx.doi.org/10.1063/1.338317.

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35

Prentice, H., and J. P. Curtis. "Heat Generation by Shaped Charge Jet Penetration." International Journal of Impact Engineering 29, no. 1-10 (December 2003): 589–600. http://dx.doi.org/10.1016/j.ijimpeng.2003.10.006.

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36

Trishin, Yu A., and S. A. Kinelovskii. "Effect of porosity on shaped-charge flow." Combustion, Explosion, and Shock Waves 36, no. 2 (March 2000): 272–81. http://dx.doi.org/10.1007/bf02699373.

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37

Grove, B., J. Heiland, and I. Walton. "Geologic materials' response to shaped charge penetration." International Journal of Impact Engineering 35, no. 12 (December 2008): 1563–66. http://dx.doi.org/10.1016/j.ijimpeng.2008.07.038.

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38

Shin, H. K., L. E. Murr, C.-S. Niou, and L. Zernow. "Dynamic recrystallization in a tantalum shaped charge." Scripta Metallurgica et Materialia 29, no. 10 (November 1993): 1291–96. http://dx.doi.org/10.1016/0956-716x(93)90126-d.

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Murr, L. E., H. K. Shih, C.-S. Niou, and L. Zernow. "Dynamic recrystallization in the shaped charge regime." Scripta Metallurgica et Materialia 29, no. 4 (August 1993): 567–72. http://dx.doi.org/10.1016/0956-716x(93)90167-q.

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40

Pipich, P. V. "Experimental investigation of fast shaped-charge jets." Journal of Applied Mechanics and Technical Physics 41, no. 5 (September 2000): 818–23. http://dx.doi.org/10.1007/bf02468726.

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41

Hu, Zhecheng, Zhijun Wang, Jianping Yin, and Jianya Yi. "Formation and Penetration Capability of an Annular-Shaped Charge." Mathematical Problems in Engineering 2021 (April 20, 2021): 1–14. http://dx.doi.org/10.1155/2021/6660189.

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Shaped charges are widely used in the field of national defense because of their high energy density and strong directivity; however, one of their limitations is that the penetration diameter is small. Compared with a traditional shaped charge, an annular-shaped charge can create a larger penetration aperture at the target, thereby causing more damage to underwater targets. To enhance the damage effect of a shaped charge on an underwater structure, we designed an annular-shaped charge structure. To end this, we first established a velocity calculation model of the liner and analyzed its formation process. The hydrocode software Autodyn was used to simulate the jet formation process. Second, two parameters of the annular liner height and thickness of the bottom and their effect on the annular jet formation were analyzed. Finally, an experiment was conducted to validate the penetration capability of this charge. The experimental results indicate that the annular-shaped charge can penetrate a typical underwater structure and form a large penetration aperture with a diameter of 420 mm, which is 1.4 times the charge diameter. Furthermore, the numerical results show good agreement with the experimental data; only a 1.67% deviation was observed.

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42

Malesa, Piotr, Grzegorz Sławiński, and Karolina Pęcherzewska. "Numerical Analysis and Experimental Test for the Development of a Small Shaped Charge." Applied Sciences 11, no. 6 (March 13, 2021): 2578. http://dx.doi.org/10.3390/app11062578.

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Currently, shaped charges are widely used in many fields of science and industry. Due to the high efficiency of piercing materials with high strength and hardness, shaped charges are commonly used in mining, military and for structural damage. The main application area of shaped charges is the military industry, where they are used in missiles with warheads (torpedoes, rocket launchers) and for piercing vehicle armor or bunker walls. When analyzing the existing solutions of shaped charges, one can find many typical solutions designed for specific applications. However, there are no universal constructions which, after appropriate regulation, will fulfil their role in a wide range of applications. The subject of this article is a new solution for a shaped charge that is characterized by compact dimensions and a short preparation time. This article presents the results of experimental research and the numerical analyses of such a charge.

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43

Gao, Yong Hong, Tian Sheng Liu, Min Rong Huang, and Xiao Hui Gu. "The Porosity of Liner Effect on the Shaped Charge Jet Penetration." Advanced Materials Research 233-235 (May 2011): 2785–89. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2785.

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Shocking temperature rise of the shaped charge with porous liner before collapse was calculated based on the Herrman equation of state. Shaped charges with 36mm charge diameter were used to fire at the 603 armor steel target, the penetration-standoff curves(P-S) of the shaped charge liner with 88.6% and 90.3%T.D were measured and compared. It is shown that proper porosity is helpful to lengthen the jet break up time and penetration depth，which is of significance for the application of porous liner.

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44

Niles, John, Steven Nicolich, Daniel Doll, and Nikki Rasmussen. "MITIGATING THE SHAPED CHARGE JET IMPACT THREAT IN MAIN CHARGE FILL AMMUNITION." International Journal of Energetic Materials and Chemical Propulsion 6, no. 3 (2007): 323–33. http://dx.doi.org/10.1615/intjenergeticmaterialschemprop.v6.i3.40.

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45

Shuai, Chen, Li Wei-bing, Wang Xiao-ming, and Yao Wen-jin. "Penetration Research of Dual-mode Penetrator Formed by Shaped Charge with Wave Shaper." Procedia Engineering 173 (2017): 57–64. http://dx.doi.org/10.1016/j.proeng.2016.12.022.

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46

Федоров, С. В. "О постановке экспериментов по определению пробивной способности хвостовых участков кумулятивных струй." Журнал технической физики 91, no. 5 (2021): 793. http://dx.doi.org/10.21883/jtf.2021.05.50691.331-20.

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According to the calculations, the penetration effect of shaped charges can be significantly increased (by 40–50 % in the case of a high-strength steel target) if due increasing the accuracy of their manufacture the lower speed threshold is reduced at which the penetration of the tail sections of the shaped-charge jet into the target is stopped. For experimental confirmation of these data, it is proposed to study in detail the penetrability of the tail sections of shaped-charge jets using cut-off rods made of high-density material located at a short distance from the shaped charge (less than its diameter) and designed to eliminate the faster part of the jet. Based on numerical simulation in the framework of a two-dimensional axisymmetric problem of continuum mechanics, possible parameters of the cut-off rods for generating solitary "tails" of shaped-charge jets with different velocities of the leading element are predicted.

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47

Федоров, С. В. "О постановке экспериментов по определению пробивной способности хвостовых участков кумулятивных струй." Журнал технической физики 91, no. 5 (2021): 793. http://dx.doi.org/10.21883/jtf.2021.05.50691.331-20.

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According to the calculations, the penetration effect of shaped charges can be significantly increased (by 40–50 % in the case of a high-strength steel target) if due increasing the accuracy of their manufacture the lower speed threshold is reduced at which the penetration of the tail sections of the shaped-charge jet into the target is stopped. For experimental confirmation of these data, it is proposed to study in detail the penetrability of the tail sections of shaped-charge jets using cut-off rods made of high-density material located at a short distance from the shaped charge (less than its diameter) and designed to eliminate the faster part of the jet. Based on numerical simulation in the framework of a two-dimensional axisymmetric problem of continuum mechanics, possible parameters of the cut-off rods for generating solitary "tails" of shaped-charge jets with different velocities of the leading element are predicted.

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48

DANIELS, Arthur, Stan DEFISHER, Greg STUNZENAS, Nausheen AL-SHEHAB, and Ernest L. BAKER. "Development and Evaluation of Small Shaped Charge Jet Threats." Problems of Mechatronics Armament Aviation Safety Engineering 8, no. 1 (March 31, 2017): 23–38. http://dx.doi.org/10.5604/01.3001.0009.8992.

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Because of their prolific nature on the battlefield, rocket propelled and gun-launched grenades are of particular concern to the soldier, particularly because of the severe reaction that occurs when a munition is hit by the shaped charge jet. As a result of the danger that such a detonation poses, it is necessary to more precisely understand the behaviour of munitions subjected to these types of devices. In response to these threats, standardized 81 mm and 40 mm shaped charge warheads were developed for use during threat assessment testing to act as a consistent, lower-cost representative of shaped charge projectiles commonly encountered on the battlefield, and to help quantify the interaction of these jest with explosive charges. The international standards for shaped charge jet threat testing uses the Held initiation criteria V2D, where V is the jet velocity and D is the diameter. V2D was computationally predicted using the high-rate continuum models CALE and ALE-3D. The surrogate warheads were test fired through aluminium target plates to strip off jet mass to adjust the V2D to the threat munition.

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Johnsson, Fredrik, Bengt Vretblad, and Åke Sivertun. "Shaped Charge Calculation Models for Explosive Ordnance Disposal Operations." Journal of Military Studies 3, no. 1 (December 1, 2012): 55–78. http://dx.doi.org/10.1515/jms-2016-0183.

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Abstract The clearance of unexploded ordnance (UXO) and other explosive remnants of war (ERW) containing shaped charge warheads poses a particular technical hazard to consider for explosive ordnance disposal (EOD) personnel. The wide use of light anti-tank weapons, such as rocket propelled grenades and the scattering of sub-munitions in different conflict areas have made the clearance of shaped charge ammunition a frequent task. However, unlike other hazards, for shaped charges, EOD personnel lack adequate means for the establishment of the maximum hazardous area and for the design of measures for hazard confinement against the shaped charge effect. In this article two different models are suggested, which together give guidance for protective measures during clearance of shaped charge ammunition. The development of these models is based on their military utility, by consideration of the limited information availability, the short time frames, the working methods and the technology level that are characteristic for EOD operations. The two suggested models are developed further into a complete set of design rules for protective measures, giving a versatile tool to replace today´s rough estimates and guesswork, in these safety-related decisions.

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Tanaka, Shigeru, Greg Kennedy, Kazuyuki Hokamoto, and Shigeru Itoh. "Experimental and Numerical Study on Liner Shaped Charge." Materials Science Forum 673 (January 2011): 209–13. http://dx.doi.org/10.4028/www.scientific.net/msf.673.209.

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There are few research papers of liner shaped charge (LSC). In this time simplified LSC was made from an explosive and vertically-folded copper plate. In order to confirm a performance of the simplified LSC, steel cutting experiments were conducted by changing distance from the simplified LSC to target steel. Numerical analysis was also conducted by using Ls-dyna. Penetration depth was measured after experiments. Collision velocity of copper was calculated by using Gurnney equation. Numerical simulation model was made by SPH, because large deformation was occurred during collision of copper and steel penetration process. Results from numerical analysis were good correspondence with experimental results. Details are reported on this paper.

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Journal articles on the topic 'Shaped charge'

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