Academic literature on the topic 'Explosively Formed Projectiles'

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Journal articles on the topic "Explosively Formed Projectiles"

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BORKOWSKI, Jacek, and Eugeniusz MILEWSKI. "EXPERIMENTAL EVALUATION OF 100 MM CHARGE FOR EXPLOSIVELY FORMED PROJECTILE." PROBLEMY TECHNIKI UZBROJENIA 162, no. 4 (2023): 7–25. http://dx.doi.org/10.5604/01.3001.0016.3023.

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The construction of 100 mm charge for explosively formed projectile was proposed in the article. The construction of charge was tested on the range. The results of field tests of an explosively formed projectile with the expected design parameters are presented. The accuracy of projectiles hitting the target at 750 calibre distance was determined. The penetration of projectiles was shown on the examples of impact on a 30 mm thick target from rolled homogenous steel. Exemplary shapes of explosively formed projectiles on the flight path in the form of imprints in a paper target are presented. The results of fragmentation of the charge casing were also analysed.
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Ismail, M. "PERFORMANCE OF EXPLOSIVELY FORMED PROJECTILES." International Conference on Chemical and Environmental Engineering 4, no. 6 (2008): 745. http://dx.doi.org/10.21608/iccee.2008.38498.

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Weickert, C. A., and P. J. Gallagher. "Penetration of explosively formed projectiles." International Journal of Impact Engineering 14, no. 1-4 (1993): 809–18. http://dx.doi.org/10.1016/0734-743x(93)90074-h.

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Ahmed, M., A. Q. Malik, S. A. Rofi, and Z. X. Huang. "Penetration Evaluation of Explosively Formed Projectiles Through Air and Water Using Insensitive Munition: Simulative and Experimental Studies." Engineering, Technology & Applied Science Research 6, no. 1 (2016): 913–16. https://doi.org/10.5281/zenodo.45614.

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The process of formation, flying, penetration of explosively-formed projectiles (EFP) and the effect of water on performance of the charge for underwater applications is simulated by Ansysis Autodyn 2D-Hydro code. The main objective of an explosively formed projectile designed for underwater applications is to disintegrate the target at longer standoff distances. In this paper we have simulated the explosively formed projectile from OFHC-Copper liner for 1200 conical angle. The Affect of water on the penetration of EFP is determined by simulations from Ansysis Autodyn 2-D Hydrocode and by varying depth of water from 1CD-5CD. The depth of penetration against steel target is measured experimentally. Flash X-Ray Radiography (FXR) is used to capture EFP jet formation and its penetration against target is measured by depth of penetration experiments. Simulation results are compared with experimental results. The difference in simulated and experimental results for depth of penetration is about 7 mm, which lies within favorable range of error. The jet formation captured from FXR is quite clear and jet velocity determined from Flash X-ray radiography is the same as the ones obtained by using other high explosives. Therefore, it is indicated that Insensitive Munition (8701) can be utilized instead of Polymer Bonded Explosives (PBX) for air and underwater environments with great reliability and without any hazard.
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Castedo, Ricardo, Anastasio Pedro Santos, José Ignacio Yenes, José Ángel Sanchidrián, Lina María López, and Pablo Segarra. "Finite elements simulation of improvised explosively formed projectiles." Engineering Computations 35, no. 8 (2018): 2844–59. http://dx.doi.org/10.1108/ec-04-2017-0130.

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Purpose The purpose of this paper is to investigate the applicability of the LS-DYNA software using a Lagrangian formulation in the jet formation, flight and penetration of improvised explosively formed projectiles (EFPs). Numerical results dealing with different properties of the EFPs have been validated with a significant number of field tests. Design/methodology/approach 2D and 3D Lagrangian models, using different material definition, are developed to reproduce the field-measured characteristics of copper- and steel-made EFPs: projectile size and velocity. After validation, the model has been extended to analyse the penetration features. Two different plasticity models have been used to describe the steel target, Plastic-Kinematic and Johnson–Cook. Findings Despite the difficulty in characterizing a non-industrial artefact, the results show that both Lagrangian models (2D and 3D) are able to simulate the projectile size, velocity and penetration capability with errors less than 10 per cent when using the Johnson–Cook material model for both liner and target. Practical implications These data can be used to test the penetration ability of improvised EFP’s against different targets, i.e. light armoured vehicles. Originality/value There are no references that address the application of the Lagrangian simulation of non-industrial EFPs and its validation with field tests, including penetration assessment.
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Ahmed, M., A. Q. Malik, S. A. Rofi, and Z. X. Huang. "Penetration Evaluation of Explosively Formed Projectiles Through Air and Water Using Insensitive Munition: Simulative and Experimental Studies." Engineering, Technology & Applied Science Research 6, no. 1 (2016): 913–16. http://dx.doi.org/10.48084/etasr.622.

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The process of formation, flying, penetration of explosively-formed projectiles (EFP) and the effect of water on performance of the charge for underwater applications is simulated by Ansysis Autodyn 2D-Hydro code. The main objective of an explosively formed projectile designed for underwater applications is to disintegrate the target at longer standoff distances. In this paper we have simulated the explosively formed projectile from OFHC-Copper liner for 1200 conical angle. The Affect of water on the penetration of EFP is determined by simulations from Ansysis Autodyn 2-D Hydrocode and by varying depth of water from 1CD-5CD. The depth of penetration against steel target is measured experimentally. Flash X-Ray Radiography (FXR) is used to capture EFP jet formation and its penetration against target is measured by depth of penetration experiments. Simulation results are compared with experimental results. The difference in simulated and experimental results for depth of penetration is about 7 mm, which lies within favorable range of error. The jet formation captured from FXR is quite clear and jet velocity determined from Flash X-ray radiography is the same as the ones obtained by using other high explosives. Therefore, it is indicated that Insensitive Munition (8701) can be utilized instead of Polymer Bonded Explosives (PBX) for air and underwater environments with great reliability and without any hazard.
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Li, Yang Jun, Wei Ping Guo, Gao Wang, and Su Jie Lian. "Study on Explosively Formed Projectiles Test System." Advanced Materials Research 760-762 (September 2013): 1254–58. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.1254.

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Explosively Formed Projectile (EFP) is a new branch of the shaped charge technology. It is developed as an anti-solid target technology in recent decades. Velocity of EFP changes quickly with the change of EFP shape. It is very important to research the velocity and morphology change of EFP in their movements to improve its performance. In this paper, theory of the exploding forming effects of EFP is analyzed, the working principle and design process of the EFP test system are introduced, and a particularly detailed description of the structures is given. The way of assembling test system and the process of data processing in the experiment are described. The experiment result shows that this system has a bright application future in the area of the EFP test, and it is worthy to further study.
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Hussain, G., A. Hameed, J. G. Hetherington, A. Q. Malik, and K. Sanaullah. "Analytical performance study of explosively formed projectiles." Journal of Applied Mechanics and Technical Physics 54, no. 1 (2013): 10–20. http://dx.doi.org/10.1134/s0021894413010021.

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DO, QUOC VI, and Nguyen Trang Minh. "Effects of the liner materials on penetration capability of explosively formed projectiles." Journal of Military Science and Technology 86 (April 28, 2023): 144–50. http://dx.doi.org/10.54939/1859-1043.j.mst.86.2023.144-150.

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Numerical simulations are carried out to study the effects of the liner material (Al, Cu, Mo, W, Ta) on the shape, mass, velocity, kinetic energy, length-to-diameter ratio, penetration depth and hole-diameter of MCT-83 mine (explosively formed projectile). The results of these parameters present the potential capability of each liner material used to fabricate explosively formed projectiles. Cu has get the maximum penetration depth value while Mo has the largest hole-diameter. The research results help to choose the material of liner suitable for each type of EFP warhead and for each different purposes.
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Cardoso, D., and F. Teixeira-Dias. "Modelling the formation of explosively formed projectiles (EFP)." International Journal of Impact Engineering 93 (July 2016): 116–27. http://dx.doi.org/10.1016/j.ijimpeng.2016.02.014.

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Dissertations / Theses on the topic "Explosively Formed Projectiles"

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Seidel, Kristoffer. "Asymmetries and Their Impact on Explosively Formed Projectiles Performance." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297798.

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Shaped Charges (SC) are explosives which are set up to concentrate the energy of an explosive to deform a thin metal cover, so called liner into either a jet of particles or a solid projectile, the latter one is refered to an Explosively Formed Projectile or EFP. The purpose of this project is to map out the effect of different asymmetries in different parts of the EFP. Several asymmetries are investigated such as cavities in the explosive, offset positions of the point of detonation as well as an array of errors concerning the liner. Using ANSYS Space Claim for modelling and IMPETUS for simulating the combustion of the explosive and deformation of the liner.  By analyzing the velocity of the projectile in both the direction it is pointed in and in the direction of the asymmetry a mapping of how potential production errors effect its performance. The following is some of the most interesting results acquired:  There is close to no difference having the detonation point further in, there is however a crucial difference in performance for the remaining asymmetries. Rust gives an asymmetrically deformed projectile, although rust on the inside perimeter of the liner gives better results than having the rust on the outside perimeter it still gives a close to useless projectile because of its form. Skewed detonation seems to give approximately 1 m/s velocity per 0.5mm of distance from the central axis. Although the simulations run here only gave a miss of around a decimeter the rotational velocity of the projectiles is what is most worrying. When it comes to cavities in the HE there is a clear pattern of the effects getting worse the closer to the liner the bubbles are. The Offset detonation shows most rotation.
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Books on the topic "Explosively Formed Projectiles"

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Waffenhilfe für Iraks Schiiten: Sadristen und der Einsatz von Explosively Formed Projectiles. GRIN Verlag GmbH, 2010.

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Duo bao zha cheng xing dan wan zhan dou bu ji shu: Multiple Explosively Formed Projectile Warhead Technology. Guo fang gong ye chu ban she, 2012.

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Book chapters on the topic "Explosively Formed Projectiles"

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Morrison, Jonathan, and Peter F. Mahoney. "Shaped Charges and Explosively Formed Projectiles." In Ryan's Ballistic Trauma. Springer London, 2011. http://dx.doi.org/10.1007/978-1-84882-124-8_8.

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Pappu, S., and L. E. Murr. "A comparison of residual microstructures in explosively formed projectiles of copper and iron and their role in hydrocode validation." In Fundamental Issues and Applications of Shock-Wave and High-Strain-Rate Phenomena. Elsevier, 2001. http://dx.doi.org/10.1016/b978-008043896-2/50154-6.

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"EXPLOSIVE FORMED PROJECTILE." In Computer Simulation of Shaped Charge Problems. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812707130_0010.

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"Explosive Formed Projectile (EFP) Devices." In Encyclopedia of Trauma Care. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29613-0_100586.

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Sen, S., S. Pappu, L. E. Murr, and D. Kapoor. "Anomalous flow phenomena in a high-oxygen-containing tantalum explosively formed projectile." In Fundamental Issues and Applications of Shock-Wave and High-Strain-Rate Phenomena. Elsevier, 2001. http://dx.doi.org/10.1016/b978-008043896-2/50140-6.

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Conference papers on the topic "Explosively Formed Projectiles"

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Mitrović, Andjela, Saša Savić, Milan Vučković, Nebojša Hristov, Damir Jerković, and Mladen Josijević. "Numerical modeling of explosively formed projectiles formation." In 11th International Scientific Conference on Defensive Technologies - OTEX 2024. Military Technical Institute, Belgrade, 2024. http://dx.doi.org/10.5937/oteh24042m.

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Within this study, the process of forming explosively formed projectiles is analyzed. This type of warhead is used for military purposes due to its excellent impact performance. The projectile is shaped like a metal disc which, during the action of the explosive, forms into a high-speed projectile. Such formed projectiles act on the target. The performance of the projectile is influenced by a large number of parameters, such as structural characteristics and material properties. Using a numerical program on the EFP model, various parameters influencing the final shape of the projectile and thus its performance on the target can be analyzed. The parameters considered within this study are the type of explosive filling and the thickness of the copper disc. The analyzed disc thickness was 1-4% of the explosive filling diameter. It was observed that reducing the thickness of the projectile results in higher values of projectile stable velocity. Specifically, reducing the initial thickness of the projectile can replace the use of more explosive explosives, thereby reducing the overall mass of the construction.
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Li, Yangjun, Weiping Guo, Gao Wang, and Su-jie Lian. "Study on Explosively Formed Projectiles Test System." In 2nd International Conference on Computer Science and Electronics Engineering (ICCSEE 2013). Atlantis Press, 2013. http://dx.doi.org/10.2991/iccsee.2013.777.

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WANG, G. S. "PERFORMANCE OF A TANTALUM FOR APPLICATIONS OF EXPLOSIVELY FORMED PROJECTILES." In 32ND INTERNATIONAL SYMPOSIUM ON BALLISTICS. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/ballistics22/36161.

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The deformation rate of explosively formed projectiles (EFPs) are extremely high, at the strain rate orders of more than a half million strain per second. The deformation occurs often at the magnitude of several hundred percent of strain, and the adiabatic heat is considerable. Challenges for developing a material model suitable for simulations of the projectile lies in the limitation of material testing where the strain rates used often are several orders of magnitude lower than what occurs in EFP projectiles. In this work, an effort is made to establish a dislocation thermal dynamics based model for a batch of tantalum to characterise its material behaviour at extreme strain rate, magnitude, and temperature, based on conventional material test results for both room and elevated temperatures at moderate strain rates. The validation of numerical simulations with this model for the EFP test results shows that there is a potential with the theoretical model based on the dislocation movement for such applications.
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Arnold, Werner, Thomas Hartmann, and Ernst Rottenkolber. "Filling the Gap between Hypervelocity and Low Velocity Impacts." In 2019 15th Hypervelocity Impact Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/hvis2019-073.

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Abstract During more than one decade of studying initiation phenomenology numerous papers at the previous HVIS and other symposia ([1] - [12]) were published. Most of them dealt with the hypervelocity impact initiation of plastic bonded high explosive charges by shaped charge jets (SCJ) and a few ones reported results in the ordnance velocity impact regime with STANAG projectiles and explosively formed projectiles (EFP) ([2] & [11]). A recent finding of our investigations of shaped charge jet (SCJ) attacks suggests that the critical stimulus S = v2∙d (v = SCJ / projectile velocity; d = SCJ / projectile diameter) for the initiation of a munition can no longer be seen as a constant (S ≠ const.) ([11] & [10]). Also, known equations, e.g. Jacobs-Roslund [13], are not capable to describe low velocity and hypervelocity impacts with the same parameter set.
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Bookout, Laurin, and Jason Baird. "Impact effects of explosively formed projectiles on normal strength concrete." In SHOCK COMPRESSION OF CONDENSED MATTER - 2011: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2012. http://dx.doi.org/10.1063/1.3686219.

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CAO, MING-YANG, JIN-XIANG WANG, CHUN-JIE HAO, KUI TANG, RUIYUAN HUANG, and NAN ZHOU. "Study on Penetration Performance and Distribution Characters of Multi-Explosively Formed Projectiles." In 30th International Symposium on Ballistics. DEStech Publications, Inc., 2017. http://dx.doi.org/10.12783/ballistics2017/16929.

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Pope, Matthew, Bradley Martin, David Lambert, Stanley E. Jones, and Jonathan Muse. "Analysis of a Soft Catch for Conventional Warheads." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71219.

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A “soft catch” is a device with which an explosively formed projectile can be decelerated to zero velocity without sustaining significant damage. The recovered projectile provides data, via metallurgical analysis, on the deformation conditions found within the explosively formed projectile. At Eglin AFB, FL, the soft catch consists of a sequence of sections (Figures 1–3), each roughly one meter long, filled with various soft media. Velocity screens are placed at the entrance and exit of each section. This enables investigators to experimentally determine the time at which the projectile passes each station in the catch. Based on these experimental measurements, average velocity estimates for each section of the soft catch can be made. The purpose of this paper is to support the soft catch design process with a one-dimensional analysis. The mathematical modeling is based on observations presented in studies by Allen, Mayfield, and Morrison [1,2]. Their work addresses the penetration of sand, but their modeling is appropriate for materials in the soft catch. The current paper describes application of their model to interpreting three soft catch experiments where Tantalum projectiles with initial velocities of approximately 1400 m/s were successfully recovered.
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FU, HENG, JIAN-BING MEN, and JIAN-WEI JIANG. "EXPERIMENTAL STUDY ON W-NI ALLOY FORMABILITY UNDER EXPLOSIVE LOADING." In 32ND INTERNATIONAL SYMPOSIUM ON BALLISTICS. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/ballistics22/36062.

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This paper presents an experimental study of the formability of W-Ni alloys with three different densities using the explosive loaded flyer plate method, so as to explore the highdensity alloy suitable for explosively formed projectile liner. The results showed that the tested materials all suffered different degrees of fracture failure and could not form a complete penetrator, which could not be used as a candidate material for the explosively formed projectile (EFP) liner. Based on the results, the forming performances of the tested materials were compared and analyzed. Combined with the material microstructure, the failure mechanism of W-Ni alloys was analyzed, and the feasibility of using W-Ni alloys as EFP liner materials was discussed. The forming performance of W-Ni alloys under the explosive loading condition was improved with a decrease in W content. Its microscopic mechanism lies in the increase of the matrix phase content, which enhances the coordination ability of dislocation movement to plastic deformation. The failure of W-Ni alloys is attributed to the difference in performance between the different phases of the multiphase alloy. When W is completely dissolved in the nickel-based ductile matrix, the W-Ni alloy is transformed from a multiphase material to a single-phase alloy (FCC), completely eliminating the dislocation pile-up problem due to the presence of the W phase. The singlephase structure may be necessary for the W-Ni alloy to be a candidate material for the EFP liner.
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Zakir, Sheikh Muhammad, Li Yulong, Ahmed Sohail, Uzair Ahmed Dar, Muhammad Farrukh Rasheed, and Atiqa Bibi. "Numerical study on the optimum design of explosively formed projectile." In 2018 15th International Bhurban Conference on Applied Sciences and Technology (IBCAST). IEEE, 2018. http://dx.doi.org/10.1109/ibcast.2018.8312213.

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Li Yangjun, Zhao Hui, Wang Xiaoyan, Wang Gao, and Zhou Hanchang. "Testing technology for explosively formed projectile based on parallel screens." In 2011 International Conference on Electronics and Optoelectronics (ICEOE). IEEE, 2011. http://dx.doi.org/10.1109/iceoe.2011.6013414.

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