Studies on the Fabrication and Stab Resistance Characterization of Novel Thermoplastic-Kevlar Composites

Hosur, M.V.; Mayo, Jessie B.; Wetzel, E.; Jeelani, S.

doi:10.4028/3-908451-50-7.83

Cited by 8 publications

(13 citation statements)

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“…Soft-nosed bullets are likely to be flattened on impact and hence act over a wide surface area, whereas a sharp and pointed edge of a weapon remains rigid and unaffected by the impact event. 64,65 Hence, body armor designed only for ballistic protection may not provide sufficient protection against stabbing attacks.…”

Section: Mechanics Of the Attacking Processmentioning

confidence: 99%

“…Several attempts have been made to use composites for stab and puncture resistance in addition to ballistic resistance. For example, Hosur et al 64 prepared thermoplastic-Kevlar (TP-Kevlar) composites that are less bulky, more flexible, and resistant to puncture. Kevlar fabric was impregnated with thermoplastic film (polyethylene, Surlyn, and co-extruded Surlyn) using a hot press to produce the composites.…”

Section: Textile Solutionsmentioning

confidence: 99%

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Body armor for stab and spike protection, Part 1: Scientific literature review

Nayak

Crouch

Kanesalingam

et al. 2017

Textile Research Journal

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Since the invention of small arms ammunition, the human torso has required protection from hand-gun bullets, and today’s civil and military personnel are regularly clad in soft body armor systems to cope with these threats. However, increasingly, the threat spectrum has widened to include a plethora of both edged and pointed weapons. Over the past two decades in particular, this has required development of either specific soft armors to defeat that particular threat, or the development of multi-threat vests that can resist both hand-gun bullets and knife and spike attacks. In this review, we provide more details about the various material combinations that are used to defeat a knife or spike, since these armor materials are a lot different from the conventional aramid fabrics, and numerous, widely-different solutions are being pursued. The penetration mechanisms associated with the various forms of attack—stabbing and slashing—are discussed, as well as the use of new fibers, shear thickening fluids, and nano-materials in developing these body armor systems.

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Section: Mechanics Of the Attacking Processmentioning

confidence: 99%

Section: Textile Solutionsmentioning

confidence: 99%

Body armor for stab and spike protection, Part 1: Scientific literature review

Nayak

Crouch

Kanesalingam

et al. 2017

Textile Research Journal

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“…This kind of body armor can provide superior ballistic performance compared to traditional ones such as chain mail and hard body armor with titanium or metallic sheets. The conventional body armor was bulky, inflexible, and not easily concealable; although it could provide a high level of resistance against ballistic or stab threats [1,2,[7][8][9]. High performance fibres, such as polyamides, aramid, S-glass, ultra high molecular weight polyethylene (UHMWPE) or polyphenylene benzobisoxazole (PBO), generally possess high strength, low density, high compressive strength, high energy absorption, and good adhesion to matrices for composite production [8,10,11].…”

Section: Motivationmentioning

confidence: 99%

“…The conventional body armor was bulky, inflexible, and not easily concealable; although it could provide a high level of resistance against ballistic or stab threats [1,2,[7][8][9]. High performance fibres, such as polyamides, aramid, S-glass, ultra high molecular weight polyethylene (UHMWPE) or polyphenylene benzobisoxazole (PBO), generally possess high strength, low density, high compressive strength, high energy absorption, and good adhesion to matrices for composite production [8,10,11]. A tightly woven fabric from a high strength fibre absorbs a significantly higher kinetic energy of the ballistic impact per its body weight than metal alloys, ceramics or composites [12,13].…”

Section: Motivationmentioning

confidence: 99%

An investigation of the mechanical and biological properties of nylon coated ultra-high-molecular-weight polyethylene

Firouzi¹

2023

Preprint

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In spite of considerable improvements in the manufacturing of body armor using lightweight and high-strength fibres, demands for lighter and more flexible products capable of providing sufficient protection against various types of threats has not waned. Among high strength fibres, ultra high molecular weight polyethylene (UHMWPE) possesses superior mechanical and physical properties. Nevertheless, the use of UHMWPE fabric with a shear thickening fluid (STF) materials for the manufacture advanced liquid body armors has been unsuccessful as this polymer is inherently inert and cannot bond or readily interact with other materials. To address these challenges, this research thesis focused on the development of a new method to increase the performance of UHMWPE fibre/fabric for high impact applications and improve its capability to bond with silica-based STF materials. A novel coating technique was developed using a nylon solution with UHMWPE fibre which results in a strong interlocking mechanism and the creation of a uniform coating without adding extra thickness to the fibre. Standard penetration tests showed considerable improvement in puncture/stab resistance of a nylon coated UHMWPE fabric compared with the uncoated fabric (with equivalent areal density) in terms of energy absorption, which was also explained by the scanning electron microscope (SEM) images of ruptured areas. In order to further improve the penetration resistance of UHMWPE fabric, a dispersion of fumed silica particles in polyethylene glycol (PEG) was synthesized exclusively via a novel sequential ultrasonication technique to incorporate with a multilayer stack of UHMWPE fabric. A complete set of rheological measurements, zeta potential and SEM analysis were done to study the viscoelastic characteristics and tune the stability of the synthesized STF samples. Evidence of the improved adhesion of STF materials to UHMWPE fibres coated with nylon from the SEM images was observed. Finally, while the evidence of improved mechanical properties of nylon coated UHMWPE were provided (e.g. higher creep resistance and toughness), its potential application for the manufacturing of medical devices was also explored. As a result, from the preliminary cytotoxicity and osteolysis assessments, it was shown that the biological compatibility of UHMWPE was improved when it was coated with nylon.

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“…Hosur et al. examined the stab resistance of thermoplastic-Kevlar composites [5]. Quasi-static tests showed that the puncture resistance of resin-treated Kevlar was highly improved.…”

Section: Introductionmentioning

confidence: 99%

Enhancing stab resistance of thermoset–aramid composite fabrics by coating with SiC particles

Wei

Wen

et al. 2018

Journal of Industrial Textiles

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Aramid has been proved to have excellent ability to protect against ballistic threats however, it has poor puncture resistance. In this research, flexible fabric materials with outstanding stab resistance were prepared with thermoset–aramid composites coated with SiC particles. The stab resistance and mechanical properties of the flexible fabric composites were evaluated. Results showed that the stab resistance of the thermoset–aramid fabrics was effectively improved by the introduction of SiC particles; however, the tear force was slightly decreased. Composites coated with 20 wt.% SiC particles exhibited the best stab resistance against knife cut. Scanning electron microscopy observation showed that the irregular SiC particles were embedded into the gaps among aramid fibers. The increased stab resistance was ascribed to the fact that the introduced SiC particles with hard and refractory nature could highly enhance the fiber-to-fiber friction and blunt the sharp metal blade by abrasion.

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Studies on the Fabrication and Stab Resistance Characterization of Novel Thermoplastic-Kevlar Composites

Cited by 8 publications

References 0 publications

Body armor for stab and spike protection, Part 1: Scientific literature review

Body armor for stab and spike protection, Part 1: Scientific literature review

An investigation of the mechanical and biological properties of nylon coated ultra-high-molecular-weight polyethylene

Enhancing stab resistance of thermoset–aramid composite fabrics by coating with SiC particles

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