Composite Personnel Armor

Alesi, Anthony L.

doi:10.21236/ad0158674

Cited by 4 publications

(3 citation statements)

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“…As previously mentioned, Alesi 13 argument, [3][4][5] lower areal density RCC projectiles (2and 4-grain) deformed when impacting the harder borosilicate glass frontal layer, whereas they do not deform during fabric armor impact. Similarly, since the larger 16-grain projectiles did not deform enough to affect the presented area significantly, the fabric armor behaves as expected, and the performance surpasses that of the hybrid panel.…”

Section: Comparison Of Results With Previous Workmentioning

confidence: 99%

“…A set of experiments performed by Alesi 13 in 1957 investigated the synergistic effects of frontal layers on the armor system as a whole. Specifically, Alesi tested hybrid panels of window glass/nylon fabric, A-110AT titanium alloy/nylon fabric, and polymethyl methacrylate (PMMA)/polyvinyl butyral (PVB) under impact from 0.22-caliber fragment-simulating projectiles (FSPs).…”

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confidence: 99%

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Effect of replacement strike-face material on the ballistic performance of multi-ply soft armor targets

Guo

Chen²,

Zheng

2018

Textile Research Journal

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In this study, the impact-face material of a multi-ply soft armor system was varied to different ratios and tested for the effects on the ballistic performance. It is known that the first few layers of multi-ply soft armor material typically fail inelastically near the system ballistic limit and can be replaced with a “sacrificial” material with other more desirable properties. Previous studies have determined that the ballistic performance of these hybrid systems is largely dependent on the amount of high-performance backing material. However, the extent to which the high-performance fabric can be replaced has yet to be fully quantified and examined. Materials of different properties, namely stainless steel mesh, Makrolon® polycarbonate sheets, and cotton, were used as replacement frontal material for 840 d Twaron® panels, and the hybrid panels were impacted by O1 tool steel right-circular cylinder projectiles fired using a single-stage smooth-bore gas gun. Results show that the ballistic performance is maintained up to a frontal material ratio of about 40%, and off-axis material properties play a role in energy dissipation.

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Section: Comparison Of Results With Previous Workmentioning

confidence: 99%

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confidence: 99%

Effect of replacement strike-face material on the ballistic performance of multi-ply soft armor targets

Guo

Chen²,

Zheng

2018

Textile Research Journal

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“…Ionomers now include polymers containing pendant carboxylic salt groups on a polyolefin backbone, with the capability of forming intermolecular ionic bonds.2 ' 3 2 2 These polar polymers are compatible with asbestos fibres23 and the same is true for the coated carbon fibres. In the literature considerable emphasis is given to ionomer based composites containing either carbon fibres2.24.25 or other reinforcing agents, especially aramid and glass fibres.2, [24][25][26][27][28][29] Combinations of asbestos with high modulus fibres, such as aramid fibres, have been extensively tested for reducing, or eliminating, the asbestos content in asbestosonly based engineering plastic^.^^-^' A similar investigation has been carried out in our laboratory on epoxybased hybrid composites in which Kevlar fibres were combined with the polyamide coated chrysotile fibres.32 The present work comprises a pilot study leading to the understanding of ionomer-based hybrid composites containing combinations of treated asbestos with aramid andlor carbon fibres.…”

Section: Introductionmentioning

confidence: 99%

Asbestos replacement aspects: Modification of the fibre‐matrix interphase in lonomer based composites

Papaspyrides

Poulakis

1992

Polymer International

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Asbestos fibres, of the chrysotile variety, and chopped carbon fibres were pretreated by an in-situ polycondensation technique eventually resulting in a polyamide coating on the fibre surface. Ionomer based composites containing either carbon or asbestos fibres in random in plane fibre orientation were prepared, and the influence of this coating process on the tensile properties was investigated. It was found that for the asbestos-filled composites the presence of the nylon 6,6 interlayer improves the tensile performance, especially at moderate polyamide depositions. This is not the case with the pretreated carbon-filled composites for which carbon fibres with higher polyamide contents are preferred. Combinations of the treated asbestos fibres with carbon and/or aramid fibres may be used to reduce the asbestos content in asbestos-only based engineering plastics.

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A merit parameter to determine the stacking order of heterogeneous diphasic soft armor systems

Guo

Chen

2020

Composite Structures

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Composite Personnel Armor

Cited by 4 publications

References 0 publications

Effect of replacement strike-face material on the ballistic performance of multi-ply soft armor targets

Effect of replacement strike-face material on the ballistic performance of multi-ply soft armor targets

Asbestos replacement aspects: Modification of the fibre‐matrix interphase in lonomer based composites

A merit parameter to determine the stacking order of heterogeneous diphasic soft armor systems

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