A Modified Penetration Model for Copper-Tungsten Shaped Charge Jet with Non-Uniform Density Distribution

Elshenawy, Tamer; Elbeih, Ahmed; Li, Qing Ming

doi:10.22211/cejem/65141

Cited by 29 publications

(15 citation statements)

References 18 publications

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“…Locking [30] stated that varying the coefficient (f x ) gives a slightly improved Gurney velocity prediction when compared with both the Cooper and Koch theories. It can be observed from both theories that the higher the detonation velocity of an explosive, the higher the Gurney velocity and the jet tip velocity, and therefore the larger the penetration depth into the target material [31].…”

Section: Resultsmentioning

confidence: 99%

Performance and Detonation Characteristics of Polyurethane Matrix Bonded Attractive Nitramines

Elbeih

Wafy

Elshenawy

2016

Cent. Eur. J. Energ. Mater.

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Several cast-cured plastic bonded explosives (PBXs) based on cyclic nitramines bonded by a polyurethane matrix have been prepared and studied. The nitramines were ε-CL20 4,6,8,10,4,6,8,10,, 3,4,imidazole), RDX (1,3,5-trinitro-1,3,5-triazacyclohexane) and HMX (1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane). The detonation velocities were measured experimentally. The brisance of the prepared compositions was determined by the Kast method. The penetration performance of shaped charges filled with the prepared compositions was measured experimentally. The detonation parameters of the studied compositions and the individual explosives were calculated using the EXPLO5 thermodynamic code. It was concluded that CL20-HTPB has the highest detonation characteristics and performance of all of the prepared PBXs. BCHMX-HTPB is an interesting PBX with performance and detonation characteristics higher than those of RDX-HTPB. A linear relationship between the detonation pressures of the prepared PBXs and their performances in terms of the explosive brisance was observed; while the penetration depths formed by the shaped charge jets depended on the Gurney velocity of the studied PBXs samples.

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Section: Resultsmentioning

confidence: 99%

Performance and Detonation Characteristics of Polyurethane Matrix Bonded Attractive Nitramines

Elbeih

Wafy

Elshenawy

2016

Cent. Eur. J. Energ. Mater.

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“…RDX (1,3,5-trinitro-1,3,5-triazinane) is one of the most usable explosives all over the world [30], it has several applications such as production of plastic explosives (composition C-4 and semtex-1H) [31,32], highly pressed explosive for shaped charges and formation of demolition charges [33,34]. In this paper, hybrid material based on CuO plated MWCNTs was synthesized by electroless plating process and employed with nano Al(100 nm) to form a hybrid thermite material.…”

Section: Figmentioning

confidence: 99%

Investigation of a novel nanothermite colloid based on CuO coated CNTs on the thermo-analytical characteristics of 1,3,5-trinitro-1,3,5-triazinane

Elbeih

2021

Preprint

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Nanothermite colloid is a promising field of research used to enhance the characteristics of energetic materials. In this study, pre-treated surfaces of multiwall-carbon nanotubes (MWCNTs) were catalysed to help the deposition of a metal and the coating process by copper (Cu) nanoscale layer through electroless deposition. The formed hybrids coated by Cu were treated at 250°C to form MWCNTs coated by CuO. Isopropyl alcohol was used to suspend the coated MWCNTs with aluminium nanoparticles (120 nm) in order to form nano thermite colloid by ultrasonic technique. The presence of CuO layer plays the role of an active oxidizer for the Aluminum nanoparticles. The obtained colloid was incorporated and dispersed in 1,3,5-trinitro-1,3,5-triazinane (RDX). The influence of colloid on RDX decomposition kinetic was evaluated using the isoconversional methods (modified Kissinger-Akahira-Sunose (KAS) methods). The mean value of apparent activation energy was reduced by 37.5 %. This dramatic change in RDX decomposition ascribed trait to the nano-thermite colloid reactivity and the facile integration of colloidal thermite particles with the RDX.

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“…AUTODYN-hydrocode is a numerical finite difference code that is based on the three conservation equations; mass, momentum and energy, in which a material is defined by its equation of state (EOS) and its strength model 23 . This software has several applications in calculating the penetration depth of shaped charge jets into different target materials 24 . It has been also used in the study and the assessment of the fragmentation pattern of fragmenting warheads and showing the metalexplosive interaction and the analysis of the produced data of calculated metal fragments 25 .…”

Section: Ansys Autodyn 3d Simulationmentioning

confidence: 99%

Ballistic Protection of Military Shelters from Mortar Fragmentation and Blast Effects using a Multi layer Structure

2019

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In addition to its usage as a top attack ammunition in the battle field against troops, 120 mm mortar bomblet has been recently used in the terror attacks against military shelters and civil constructions. This research studies the protection of vehicle and personnel military shelters against mortar fragmentation warhead projectile and it's destroying effects. The mortar warhead threat combines both blast load and ballistic fragment penetration effects. Composite structure layers are proposed herein to be integrated with concertina walls to achieve full protection against the mortar projectile destroying effects. The current paper investigates the ability of the proposed layers to stop the mortar's fragments and to mitigate its blast load. The velocity and the mass distribution of the produced projectile fragments were estimated using Split-X software. Besides, the ability of the proposed protection layers to stop the fragments and mitigate the blast wave was evaluated using AUTODYN hydrocode. A static firing test was then performed to validate the theoretical results and verify the effectiveness of the proposed protection added layers. The current study showed that the proposed composite layers are sufficient to protect the military shelters from the mortar's destroying ballistic effects.

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A Modified Penetration Model for Copper-Tungsten Shaped Charge Jet with Non-Uniform Density Distribution

Cited by 29 publications

References 18 publications

Performance and Detonation Characteristics of Polyurethane Matrix Bonded Attractive Nitramines

Performance and Detonation Characteristics of Polyurethane Matrix Bonded Attractive Nitramines

Investigation of a novel nanothermite colloid based on CuO coated CNTs on the thermo-analytical characteristics of 1,3,5-trinitro-1,3,5-triazinane

Ballistic Protection of Military Shelters from Mortar Fragmentation and Blast Effects using a Multi layer Structure

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