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426 Newest Publications in propellants, explosives, pyrotechnics

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Shock Tube Effect Inside a Pyrotechnic Igniter

20-Mar-2015 | Gavin A. Buttigieg, Gregory H. Paine, Ralph C. Hsiao, Propellants, Explosives, Pyrotechnics, 2015

Abstract An output closure is a critical component of a pyrotechnic igniter. It controls the heat transfer duration of initiation train, stress loading on the propellant grain, and the pressure drop during closure deployment. Normally the pressure profiles calculated by a quasi‐static interior ...

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Effects of Temperature and Strain Rate on the Dynamic Fracture Properties of HTPB Propellant

13-Mar-2015 | Bing Long, Xinlong Chang, Kuan Hu, Youhong Zhang, Propellants, Explosives, Pyrotechnics, 2015

Abstract In order to study the influence of temperature and strain‐rate on HTPB propellant fracture capability under impact loading conditions, a dynamic fracture experiment at different temperatures was carried out by using the cracked straight‐through Brazilian disc (CSTBD) specimen on the ...

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Theoretical Study on Equivalent Target of Ceramic Composite Armor

13-Mar-2015 | Xu‐Dong Zu, Zheng‐Xiang Huang, Qiang‐Qiang Xiao, Bei‐Bei Liu, Propellants, Explosives, Pyrotechnics, 2015

Abstract The theory of equivalent target was studied by considering the standoff curve and the penetration model of the horizontal velocity method to analyze the equivalent mechanism of spaced target equating ceramic composite armor. This theory can forecast the penetration ability of the ...

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The Development of a Confined Impact Test for Evaluating the Safety of Polymer‐Bonded Explosives During Warhead Penetration

13-Mar-2015 | Xiaogan Dai, Qian Huang, Fenglei Huang, Ming Li, Yushi Wen, Xuwang Liu, Propellants, Explosives, Pyrotechnics, 2015

Abstract During warhead penetration, which lasts several milliseconds, warheads undertake moderate pressures reaching hundreds of MPa. Previous methods have been unable to mimic such stimuli to evaluate the safety of ammunitions. Hence, new safety evaluation methods with moderate pressures and ...

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Interior Ballistics Two‐Phase Reactive Flow Model Applied to Small Caliber Projectile‐Gun System

13-Mar-2015 | Ahmed Bougamra, Huilin Lu, Propellants, Explosives, Pyrotechnics, 2015

Abstract Multi‐dimensional multi‐component two‐phase flow modeling of solid propellant combustion in weapons is the new trend of the interior ballistics codes. Most of these codes are designated to large caliber guns and rockets simulation. Only a small number of investigations on ...

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Nitrogen‐Rich Energetic 1,2,5‐Oxadiazole‐Tetrazole – Based Energetic Materials

11-Mar-2015 | Thomas M. Klapötke, Tomasz G. Witkowski, Propellants, Explosives, Pyrotechnics, 2015

Abstract Research for new energetic materials with tailored properties is of particular interest in many research groups. In order to meet challenging requirements heterocyclic systems have been investigated. One of the most promising area of research is synthesis of high nitrogen content ...

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Quantifying Dynamic Processes in Reactive Materials: An Extended Burn Tube Test

27-Feb-2015 | Kyle T. Sullivan, Octavio Cervantes, John M. Densmore, Joshua D. Kuntz, Alexander E. Gash, John D. Molitoris, Propellants, Explosives, Pyrotechnics, 2015

Abstract A common method for measuring the reactivity of rapidly deflagrating materials has been to loosely pack a desired mixture into an approx. 10 cm long×3 mm diameter acrylic tube, ignite the material on one end, and report the observed self‐propagating flame velocity through the ...

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Characterization of Erythritol Tetranitrate. Part I: Physical Properties

27-Feb-2015 | Robert Matyáš, Martin Künzel, Aleš Růžička, Petr Knotek, Ondřej Vodochodský, Propellants, Explosives, Pyrotechnics, 2015

Abstract The article describes the molecular structure and fundamental physical properties of erythritol tetranitrate (ETN). Although ETN is simple nitrate ester this explosive is described in the literature relatively briefly. The molecular structure of ETN was characterized by single‐crystal ...

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Developing a Combustion Model of a Solid Propellant Containing Capsules of Liquid Oxidizer

27-Feb-2015 | Or Livne, Alon Gany, Propellants, Explosives, Pyrotechnics, 2015

Abstract A combustion model of a solid propellant containing liquid oxidizer capsules was developed. The model is based on the combustion cycle of a unit cell, an oxidizer droplet surrounded by the adjusting amount of binder. Three combustion stages are considered: (1) binder decomposition ...

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Active Sensing for Monitoring the Properties of Solid Rocket Motor Propellant Grains

20-Feb-2015 | Craig Lopatin, Dan Grinstein, Propellants, Explosives, Pyrotechnics, 2015

Abstract Aging induced changes in the mechanical properties of solid propellant can lead to defects, such as cracks and grain‐liner separations, that limit the service lifetime of solid rocket motors. The use of embedded sensors is one approach that is being explored by various researchers to ...

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