Wyniki wyszukiwania - BazTech

1

Ceramika węglikowa w lekkich osłonach balistycznych

Cegła M., Habaj W.

Materiały Ceramiczne

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2015

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T. 67, nr 2

132--136

PL

Ceramika węglikowa stosowana jest z powodzeniem do wytwarzania elementów osłon balistycznych, chroniących przed pociskami przeciwpancernymi. Dzięki połączeniu wysokiej twardości z niską gęstością stanowi dobrą alternatywę dla tradycyjnych pancerzy stalowych. W artykule przedstawione zostaną cechy dwóch ceramicznych materiałów balistycznych: węglika krzemu (SiC) oraz węglika boru (B4C). Zaprezentowane zostaną także wyniki ostrzału warstwowych osłon balistycznych, zawierających ceramikę, za pomocą nowoczesnej amunicji pistoletowej o właściwościach przeciwpancernych.

EN

Carbide ceramics have been successfully used for ballistic armour applications protecting against armour piercing projectiles. A combination of high hardness and low density makes ceramics a good substitute of traditional steel armours. Properties of two ceramic armour materials: silicon carbide (SiC) and boron carbide (B4C) are being described. Finally the authors present results of ballistic tests of ceramic-based multi-layered armours systems against modern pistol ammunition with armour piercing capabilities.

2

Hybrid Ceramic-Textile Composite Armour Structures for a Strengthened Bullet-Proof Vest

Cegła M., Habaj W., Stępniak W., Podgórzak P.

Fibres & Textiles in Eastern Europe

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2015

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Vol. 23, no. 1 (109)

85--88

EN

The article presents the problem of protection against 5.7 × 28 mm SS190 projectiles with increased penetration capabilities. Due to the hybrid structure of the projectile, SS190 ammunition is a considerable danger to traditional, commonly used bulletproof vests based only on soft textile materials. A composite ballistic armour system based on small-size ceramics and fibre composites is presented as an answer to this threat. The construction of modern armour systems, the materials used and sample preparation is described. Ballistic test results of composite samples are presented by X-ray photographs. The authors also propose the possible use of these composite armour systems in personal body armour.

PL

W artykule poruszona jest problematyka ochrony przed amunicją 5,7×28 mm SS190 o zwiększonej zdolności do penetracji. W związku z hybrydową budową pocisku SS190 stanowi on poważne zagrożenia dla powszechnie stosowanych kamizelek kuloodpornych na bazie materiałów tkaninowych. Jako odpowiedź na to zagrożenie przedstawione zostają kompozytowe układy balistyczne zbudowane na bazie małogabarytowej ceramiki oraz kompozytów włóknistych. Omówiona została budowa nowoczesnych układów balistycznych, stosowane materiały oraz przygotowanie próbek. Wyniki badań odporności balistycznej zostały przedstawione w formie zdjęć rentgenowskich. Autorzy sugerują także możliwe zastosowania badanych układów hybrydowych w osobistych osłonach balistycznych.

3

Numerical analyses of ceramic/metal ballistic panels subjected to projectile impact

Morka A., Nowak J.

Journal of KONES

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2012

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Vol. 19, No. 4

465-472

EN

The paper concerns research and development on modern, ceramic-based, protective layers used in the armour of tanks, combat vehicles and aeroplanes. A task of ceramic panels is reduction and dispersion of localized kinetic energy before a projectile or its fragment approaches the interior of protected object. The numerical investigations have been performed to determine the ballistic resistance of ceramic/metal panels subjected to projectile impact. The impact of the 7.62mm armour-piercing projectile on the ceramic elements backed by a metal plate was analyzed. The tested panels were composed of a ceramic layer (Al2O3, SiC or B4C) and a metal layer (7017 aluminium alloy, Armox 500T steel or Ti6Al-4 titanium alloy). Different shapes of ceramic elements were analyzed, including hemispheres and pyramids, with respect to standard flat tiles. The influence of the impact point location was also taken into considerations. The computer simulations were performed with the Finite Element Method implemented in LS-DYNA code. Full 3D models of the projectile and targets were developed with strain rate and temperature dependent material constitutive relations. The conclusions presented in the paper can be applied to develop modern impact protection panels in which the appropriate balance between the mass and protection level must be accomplished.

4

Numerical study of the shape effect in the ceramic based ballistic panels

Morka A., Jackowska B., Niezgoda T.

Journal of KONES

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2009

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Vol. 16, No. 4

539-548

EN

The numerical investigations have been performed to determine the front surface shape effect in the cer based armour systems. Different shapes of ceramic elements were analyzed, including hemispheres and pyramids with respect to standard flat tiles. The influence of the impact point location was also under considerations. The Computer simulations were performed with the Element Free Galerkin Method (EFG) implemented in LS-D code. An impact of the 14.5xll8mm B32 armour piercing projectile on the A12O3 different shape elements backe 7017 aluminium alloy plate was analyzed. Full 3D models of the projectile and targets were developed with strain, rate and temperature dependent material constitutive relations. The models of the projectile, ceramic and aluminium alloy targets were validated with utilization of the experimental data found in literature. The obtained results confirm, the preliminary presumptions, that the shape of the front surface can significant role in the overall ballistic resistance of the panel. Particularly projectile-target initial contact area st to be important factor as showed by impact point location analysis. The conclusions presented in this paper can be applied to develop modern impact protection panels where the appropriate balance between the mass and protection level must be accomplished.