25 results on '"BALLISTICS"'
Search Results
2. Perspective Armour-Piercing Intermediate Cartridge Projectile.
- Author
-
PIASTA, Krzysztof and KUPIDURA, Przemysław
- Subjects
PROJECTILES ,FIREARMS ,AMMUNITION ,INFANTRY - Abstract
Copyright of Problems of Mechatronics. Armament, Aviation, Safety Engineering / Problemy Mechatroniki. Uzbrojenie, lotnictwo, Inżynieria Bezpieczeństwa is the property of Index Copernicus International and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
- Full Text
- View/download PDF
3. Projectile for a New Intermediate Cartridge.
- Author
-
PIASTA, Krzysztof, KUPIDURA, Przemysław, and LEŚNIK, Grzegorz
- Subjects
BALLISTICS ,FIREARMS ,MECHANICAL engineering ,AMMUNITION ,PROJECTILES - Abstract
Copyright of Problems of Mechatronics. Armament, Aviation, Safety Engineering / Problemy Mechatroniki. Uzbrojenie, lotnictwo, Inżynieria Bezpieczeństwa is the property of Index Copernicus International and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
4. Interior Ballistics of Amphibious Rifle when Firing under Water.
- Author
-
Konečný, P., Dao, V. D., Nguyen, V. H., and Le, H. B.
- Subjects
- *
BALLISTICS , *RIFLES , *AMMUNITION , *PROJECTILES , *WATER - Abstract
The paper deals with an adaptation of the standard interior ballistics model for the case of amphibious rifle shooting ammunition under water. The adapted mathematical model was validated and experimentally verified using the 5.56 mm underwater projectile shot from the 5.56 mm amphibious rifle. The dependence of the underwater interior ballistic processes on the powder mass was investigated. The results of theoretical mathematic model solution correspond very well with experiment. The described mathematical model and the dependence of the underwater interior ballistic processes on the powder mass can be a reference for designers in the design process of the underwater ammunition or underwater rifle. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
5. A Quantitative Method of Comparative Assessment of Primers Ignition Performances.
- Author
-
Goga, D. A., Ţigănescu, T. V., Pulpea, B., Moldoveanu, C., and Rotaru, C.
- Subjects
- *
AMMUNITION , *PRESSURE transducers , *COMBUSTION , *BALLISTICS , *PROJECTILES - Abstract
The ignition performances of percussion primers for small calibre ammunition are determined using a new experimental setup, with pressure transducers and special designed combustion chambers. The method enables a comparison of new designed primers with consecrated models by relative ignition capacity. Results show that ballistic performances of primers are in direct relationship with the gradient pressure vs. rise time and also with the maximum pressure developed inside the cartridge chamber. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
6. The 'triple contrast' method in experimental wound ballistics and backspatter analysis.
- Author
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Schyma, Christian, Lux, Constantin, Madea, Burkhard, and Courts, Cornelius
- Subjects
- *
BALLISTICS , *PROJECTILES , *AMMUNITION , *PENETRATION mechanics , *COMPUTED tomography - Abstract
In practical forensic casework, backspatter recovered from shooters' hands can be an indicator of self-inflicted gunshot wounds to the head. In such cases, backspatter retrieved from inside the barrel indicates that the weapon found at the death scene was involved in causing the injury to the head. However, systematic research on the aspects conditioning presence, amount and specific patterns of backspatter is lacking so far. Herein, a new concept of backspatter investigation is presented, comprising staining technique, weapon and target medium: the 'triple contrast method' was developed, tested and is introduced for experimental backspatter analysis. First, mixtures of various proportions of acrylic paint for optical detection, barium sulphate for radiocontrast imaging in computed tomography and fresh human blood for PCR-based DNA profiling were generated (triple mixture) and tested for DNA quantification and short tandem repeat (STR) typing success. All tested mixtures yielded sufficient DNA that produced full STR profiles suitable for forensic identification. Then, for backspatter analysis, sealed foil bags containing the triple mixture were attached to plastic bottles filled with 10 % ballistic gelatine and covered by a 2-3-mm layer of silicone. To simulate backspatter, close contact shots were fired at these models. Endoscopy of the barrel inside revealed coloured backspatter containing typable DNA and radiographic imaging showed a contrasted bullet path in the gelatine. Cross sections of the gelatine core exhibited cracks and fissures stained by the acrylic paint facilitating wound ballistic analysis. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
7. A study of the penetration behaviour of mild-steel-cored ammunition against boron carbide ceramic armours.
- Author
-
Crouch, Ian G., Appleby-Thomas, Gareth, and Hazell, Paul J.
- Subjects
- *
AMMUNITION , *PROJECTILES , *BORON carbides , *CERAMIC armor , *BALLISTICS , *IMPACT (Mechanics) , *COMPUTER simulation - Abstract
In this study, the penetration behaviour of a Mild Steel Cored (MSC) round, 7.62 mm in diameter and 39 mm in length, commonly known as the AK47 round, was studied since it still forms an important part of the threat spectrum for personnel body armour systems. Likewise, boron carbide strike face materials were selected since this armour material is often the material of choice for ultralightweight body armour systems for protection against this particular threat. The presence of two, relatively soft, intermediate materials (the copper jacket and filler material of the bullet, and a fibre-reinforced polymer cladding layer on the ceramic) between the mild steel core and the boron carbide target was examined using reverse ballistics techniques, flash x-radiography and round recovery measurements. This was supported by selective numerical simulations using the computer code ANSYS-AUTODYN. It was found that stripping of the jacket, from the AK47 MSC rounds, makes a difference to its penetrating ability: the mild steel core is significantly reduced in length, and mass, when the jacket is not present. The magnitude of this effect is much greater than previously reported for high-strength steel-cored rounds and for tungsten carbide-cored rounds. The penetration event appears to be a twostage process: mushrooming of the mild steel core on, or near, the surface of the ceramic, followed by a linear erosion process as the core penetrates the ceramic itself. The second step has not been reported previously for MSC rounds. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
8. Velocity Testing of Low Energy Projectiles as a Challenge for Modern Forensic Science.
- Author
-
Bukowiecka, Danuta and Wojciechowski, Maciej
- Subjects
WEAPON laws ,AMMUNITION ,PROJECTILES ,POLICE academies ,PROPELLANTS ,LAW - Abstract
Copyright of Internal Security is the property of Police Academy in Szczytno and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2014
- Full Text
- View/download PDF
9. Analysis of Armor-Piercing Projectile Hit Probability Influenced by Target Decelerating Manoeuvre.
- Author
-
ZHANG Yu, WEI Chao, HUO Jian-peng, and SONG Wei-qun
- Subjects
PROJECTILES ,AMMUNITION ,PROBABILITY theory ,BALLISTICS ,PENETRATION mechanics - Abstract
This paper put forward a method of reducing the armor-piercing projectile hit probability by investigating the characteristics of modern tank fire control system and armor-piercing projectile. A hit probability model based on traditional firing theory was established and analyzed. The results show that this method is effective. The further study points out that the most effective way to decrease the hit probability is reducing the response time of the target. [ABSTRACT FROM AUTHOR]
- Published
- 2011
10. Linear Electromagnetic Oil Pumping Unit Based on the Principle of Coil Gun.
- Author
-
Xiaopeng Li, Ku Tian, Chunhua Li, Yuan Zhou, Liyi Li, and Junjie Hong
- Subjects
- *
BALLISTICS , *PROJECTILES , *MILITARY shooting , *AMMUNITION , *ENERGY dissipation - Abstract
Projectiles in coil gun usually make one-way movement and move at a very high speed. The device would be fit for the application of oil pumping unit, as long as the projectiles can make reciprocating movement and move slower by adopting proper control methods. At present, during the production process of petroleum, the efficiency of the system is rather low. Energy dissipation takes a considerable ratio in the total cost of oil production. Moreover, beam pumping-unit system suffers from long driving chain, poor flexibility, a quite huge capacity and weight under long length of stroke, and low efficiency. Aiming at the earlier problems, linear electromagnetic oil pumping unit is presented in this paper, which is essentially a multiphase coil launcher. Analysis is made about the advantages and disadvantages of three~phase and multiphase structures, as well as the practical structure. Simulation studies are made; meanwhile, experimental investigations are carried out on a small-scale-model machine system. Further simulation studies of coil launching system are carried through the mechanical and mathematical models of rod string in a sucker-rod pumping-unit system. Theoretical analysis and experimental results verify the feasibility and the validity of the proposed system. Thus, a new path to solve the problem of high energy dissipation in oil production is explored. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
11. Lightweight ceramic composite armour system.
- Author
-
Medvedovski, E.
- Subjects
- *
CERAMICS , *BALLISTICS , *PROJECTILES , *POLYMERS , *AMMUNITION - Abstract
The development of lightweight armour systems for ballistic protection is under continuing attention of the manufacturers and users. A new design of the composite armour systems has been developed and ballistically tested. A new armour system consists of a ceramic plate, an intermediate ceramic–polymer layer and a polymer fibre lining as a backing material. The proposed composite armour systems prepared with a use of specially selected compositions of the intermediate layer promoting the absorption of the kinetic energy of projectiles provide adequate ballistic protection to National Institute of Justice (NIJ) level III and level IV, and they successfully withstand multiple hits. [ABSTRACT FROM AUTHOR]
- Published
- 2006
- Full Text
- View/download PDF
12. Building The 90 Grain AR-15, Part Three.
- Author
-
Carlos, Joe
- Subjects
AR-15 rifle ,RIFLES ,FIREARM design & construction ,BULLETS ,PROJECTILES ,BALLISTICS ,AMMUNITION ,WEAPONS design & construction - Abstract
The article provides an overview of projectiles and loads for heavy bullet, the .223/5.56 AR-15s. Topics covered include some notes on brass, shoulder bump, and neck tension, the use of the Alliant Reloder 15 or Vihtavuori N140 powders in 90 grain loads for 20" service rifle barrels and suggestions to order the Bartlein Gain Twists with tall 0.218" land deep 0.2245" groove.
- Published
- 2014
13. Ballistic protection using snow.
- Author
-
Blaisdell, George L., Melendy, Terry D., and Blaisdell, Marin N.
- Subjects
- *
SETUP time , *FIREARMS , *BALLISTICS , *AMMUNITION , *PROJECTILES - Abstract
• Small and medium arms fire can be stopped with a snow-based protective structure. • Snow-filled commercial gabions can be efficiently constructed. • Structures can be construction at a rate of about 0.5 hr/m3 with common equipment. • Snow set-up time of 24 h is recommended. • All but one model of projectile penetration in snow matched our results within 32%. Small (5.56 mm, 7.62 mm and 9 mm) and medium (12.7 mm) arms rounds were fired at snow-filled 1.5m cubic gabions in a mid-winter condition in Fairbanks, Alaska. The rounds were excavated and penetration by each ammunition type was measured. A distribution and average of penetration depth was determined. All 320 rounds fired were captured within 1.5m after entering the snow barrier. Comparison with published models of ballistics penetration of snow showed mixed results with several matching our data within 10% and all but one within 32%. However, most of these models are simplistic in that they accommodate limited variables and therefore may not be expected to perform well in all settings. We conclude that snow-based ballistics protection structures can be quickly and efficiently erected in suitable environments and with minimal size, can provide reliable protection against small and medium arms fire. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
14. Analytical and numerical description of the PELE fragmentation upon impact with thin target plates
- Author
-
Jimmy Verreault
- Subjects
High-impact velocities ,Materials science ,Numerical models ,Projectiles ,Ballistics ,Velocity ,Aerospace Engineering ,PELE projectile ,Fragmentation patterns ,High Tech Systems & Materials ,Ocean Engineering ,Numerical simulation ,PELE fragmentation ,Analytical model ,Weapon systems ,WS - Weapon Systems ,Radial acceleration ,Mechanics, Materials and Structures ,Computer software ,Analytical models ,Terminal ballistics ,Ammunition ,Safety, Risk, Reliability and Quality ,Civil and Structural Engineering ,Filling ,TS - Technical Sciences ,Industrial Innovation ,Computer simulation ,Projectile ,Pressure evolution ,Mechanical Engineering ,Acoustics ,Acoustic wave ,Mechanics ,Radial velocity ,Classical mechanics ,Mechanics of Materials ,Quantitative comparison ,Rankine-Hugoniot relations ,Free surface ,Automotive Engineering ,Acoustic approximation ,Aluminum - Abstract
The PELE ammunition is characterized by a low-density filling material surrounded by a high-density brittle jacket material. An analytical model describing the fragmentation of this ammunition behind a target plate is presented. This model assumes uniaxial strain in the filling and uses the Ranking–Hugoniot relations to calculate the material state. In addition, shock and rarefaction wave interactions at the target free surface and the filling/target interface are accounted for, as well as the radial rarefaction originating from the jacket outer surface. This allows the calculation of the pressure evolution in the filling and the radial acceleration of the jacket at any axial position along the projectile. This model aims at improving previously published analytical models where the acoustic wave approximation was used and the wave interactions were neglected. Experimental results (Paulus and Schirm, 2006) are used to validate the analytical model for different target materials (aluminum and steel), target thicknesses (3 mm and 8 mm), filling materials (polyethylene and aluminum) and impact velocities (900 m/s to 3000 m/s). A qualitative comparison based on X-ray photographs reveals similar features between the model and the experiments, such as smaller and lighter fragments with a greater radial velocity at the front of the projectile compared to the fragment characteristics at the back of the projectile. A quantitative comparison based on the maximum radial velocity of the fragments shows on average a 20% difference between the analytical and experimental results for all impact conditions considered. Despite this difference, the analytical trend follows more closely the experimental one compared to the acoustic approximation especially at high impact velocities. In addition, the acoustic approximation fails to reproduce the jacket fragmentation pattern since the fragmentation length of the jacket is significantly under-predicted. A numerical simulation is also presented using the ANSYS Autodyn 14.0 software. The results show that the numerical and analytical pressure evolution in the filling and the radial velocity of the jacket are in very good agreement, verifying the uniaxial strain assumption. This agreement (together with the experimental agreement) thus suggests that the Rankine–Hugoniot relations, the wave interactions and the radial rarefaction wave must all be included in the model to adequately describe the fragmentation of the PELE ammunition behind a thin target plate.
- Published
- 2015
15. Plastic-tipped bullets.
- Author
-
Tabor, Thomas
- Subjects
BULLETS ,PROJECTILES ,FIREARM equipment ,BALLISTICS ,AMMUNITION - Abstract
The article features bullets which have colored plastic tip at the end. It notes that bullet buyers have paid attention to the little flashy appendages. The appendages are made not only for cosmetic reasons. The article explores the benefits associated with having a bullet capped off and examines if the appendages are marketing fluff.
- Published
- 2010
16. Place Your Bets.
- Author
-
Carmichel, Jim
- Subjects
- *
CARTRIDGES (Ammunition) , *AMMUNITION , *BALLISTICS , *PROJECTILES , *GUNNERY - Abstract
The article offers a guide to placing a bet on a cartridge race. Though dedicated, or proprietary, cartridges may offer some profit or ego satisfaction for their owner/developers, do not bet on any of them becoming the next ballistic sensation. Unlike ordinary do-it-yourself wildcats, proprietary rounds are cloaked in semi-respectability, usually, but not always, by dint of being head-stamped with their proprietary name. Meanwhile, the most successful dangerous-game cartridge of modern times is the .458 Winchester Magnum.
- Published
- 2007
17. Analytical and numerical description of the PELE fragmentation upon impact with thin target plates
- Subjects
High-impact velocities ,Numerical models ,Projectiles ,Ballistics ,Velocity ,PELE projectile ,Fragmentation patterns ,High Tech Systems & Materials ,Numerical simulation ,PELE fragmentation ,Mechanics ,Analytical model ,Weapon systems ,WS - Weapon Systems ,Radial acceleration ,Computer software ,Analytical models ,Terminal ballistics ,Ammunition ,Filling ,TS - Technical Sciences ,Industrial Innovation ,Pressure evolution ,Acoustics ,Computer simulation ,Quantitative comparison ,Rankine-Hugoniot relations ,Materials and Structures ,Aluminum - Abstract
The PELE ammunition is characterized by a low-density filling material surrounded by a high-density brittle jacket material. An analytical model describing the fragmentation of this ammunition behind a target plate is presented. This model assumes uniaxial strain in the filling and uses the RankingeHugoniot relations to calculate the material state. In addition, shock and rarefaction wave interactions at the target free surface and the filling/target interface are accounted for, as well as the radial rarefaction originating from the jacket outer surface. This allows the calculation of the pressure evolution in the filling and the radial acceleration of the jacket at any axial position along the projectile. This model aims at improving previously published analytical models where the acoustic wave approximation was used and the wave interactions were neglected. Experimental results (Paulus and Schirm, 2006) are used to validate the analytical model for different target materials (aluminum and steel), target thicknesses (3 mm and 8 mm), filling materials (polyethylene and aluminum) and impact velocities (900 m/s to 3000 m/s). A qualitative comparison based on X-ray photographs reveals similar features between the model and the experiments, such as smaller and lighter fragments with a greater radial velocity at the front of the projectile compared to the fragment characteristics at the back of the projectile. A quantitative comparison based on the maximum radial velocity of the fragments shows on average a 20% difference between the analytical and experimental results for all impact conditions considered. Despite this difference, the analytical trend follows more closely the experimental one compared to the acoustic approximation especially at high impact velocities. In addition, the acoustic approximation fails to reproduce the jacket fragmentation pattern since the fragmentation length of the jacket is significantly under-predicted. A numerical simulation is also presented using the ANSYS Autodyn 14.0 software. The results show that the numerical and analytical pressure evolution in the filling and the radial velocity of the jacket are in very good agreement, verifying the uniaxial strain assumption. This agreement (together with the experimental agreement) thus suggests that the RankineeHugoniot relations, the wave interactions and the radial rarefaction wave must all be included in the model to adequately describe the fragmentation of the PELE ammunition behind a thin target plate.
- Published
- 2015
18. Numerical simulation of temporary cavity related to ballistic trauma caused by flechette ammunition.
- Author
-
Matei, Marius Valeriu Cîrmaci
- Subjects
- *
WOUNDS & injuries , *BALLISTICS , *AMMUNITION , *PROJECTILES , *KINETIC energy , *COMPUTER simulation - Published
- 2016
- Full Text
- View/download PDF
19. HEVI-Shot.
- Author
-
Fulton, Pancho
- Subjects
AMMUNITION ,HUNTING equipment ,BULLETS ,PROJECTILES ,BALLISTICS - Abstract
Evaluates two projectiles developed by ENVIRON-Metal for hunting. Dead Coyote! Varmint Bullets; Dead Coyote! Shotshells.
- Published
- 2005
20. World's Largest Gun.
- Author
-
Eisenstein, Paul
- Subjects
- *
PROJECTILES , *BALLISTICS , *WEAPONS , *AMMUNITION , *MILITARY shooting - Abstract
This article presents information related to technical aspects of the railwaymounted Paris Gun. The 264-pound projectiles soared 25 miles into the stratosphere, reaching their target in 170 seconds. Formally known as the Kaiser Wilhelm Geschutz Long-Range Guns, the weapons were produced by the dreaded Friedrich Krupp AG munitions firm. The guns used bored-out, 380mm naval cannons, each fitted with barrels that were 131 ft. long. Seven were produced, though never more than three operated at any time.
- Published
- 2005
21. Efficacy of Cartridge Type and Projectile Design in the Harvest of Beaver
- Author
-
Parker, Howard, Rosell, Frank, and Danielsen, Johan
- Published
- 2006
22. Improving Animal Welfare in Wildlife Shooting : The Importance of Projectile Energy
- Published
- 2016
23. Military Operations Research Society (MORS) Oral History Project Interview of Mr. Arthur Stein and Dr. Annette Stein
- Author
-
Stein, Arthur, Stein, Annette, and Visco, Eugene P.
- Published
- 2014
24. Application of Ballistics in Legal Cases
- Author
-
Wiard, Seth
- Published
- 1931
- Full Text
- View/download PDF
25. Ballistics as Applied to Police Science
- Author
-
Wiard, Seth
- Published
- 1930
- Full Text
- View/download PDF
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