The ballistic performance of aramid based fabrics impregnated with multi-phase shear thickening fluids

Gürgen, Selim; Kuşhan, Melih Cemal

doi:10.1016/j.polymertesting.2017.11.003

Cited by 155 publications

(63 citation statements)

References 57 publications

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“…The essential physics of the impact mechanism associated with STF impregnation into fabrics is difficult to investigate through experimental means alone. It has been reported that the primary contribution of STF impregnation in high velocity fabric was the increase of friction between yarns in the fabric that resulted in the enhancement of the energy absorption reflected in experimental observations [46]. Alikarami, et al [47] conducted an experimental investigation on the yarn pull-out test for calculating friction coefficient in fabric samples for three cases: neat, dissolved liquid, and STF-treated fabrics.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Ballistic performance of Kevlar fabric impregnated with nanosilica/PEG shear thickening fluid

Khodadadi

Liaghat

Vahid

et al. 2019

Composites Part B: Engineering

134

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This study presents the response of fiber reinforced composite material composed of woven Kevlar fabric impregnated with a colloidal shear thickening fluid (STF) under high velocity impact loading. The STF was made by dispersing silica nanoparticles at 15, 25, 35 and 45 wt.% loading in polyethylene glycol. The effects of silica nanoparticle loading on energy absorption and ballistic limit were studied experimentally. Rheological results revealed that shear thickening occurred at all four nanosilica loading and higher loading showing the higher shear thickening at lower shear rate. SEM images confirmed good dispersion of nanosilica particles in the suspension. The results of the pull out test show that by increasing nanosilica loading, the force required to pull the yarn out from the fabric impregnated by STF increases. Impact resistance performance of Kevlar fabric is significantly enhanced due to the presence of STF. Although high velocity impact results show that by increasing nanosilica loading, the energy absorption of composites increases, but in high loading of nanosilica, the effectiveness of STF decreases. For further investigation, the energy absorption at the ballistic limit was normalized by the areal density of the neat and impregnated fabrics to give the specific energy absorption (SEA). It is found that the SEA of 15 wt.% nanosilica loading is lower compared to the neat fabric. Also the highest SEA turn out in the case of 35 wt.% STF/Kevlar composites in which the SEA is 2.3 times larger than those of the neat fabric.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Ballistic performance of Kevlar fabric impregnated with nanosilica/PEG shear thickening fluid

Khodadadi

Liaghat

Vahid

et al. 2019

Composites Part B: Engineering

134

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“…They have excellent stab resistance but are heavyweight, which restricts the mobility of users. By contrast, flexible or semi-flexible stab resistant materials, such as high-density polyethylene, aramid mixture fabric, and specially made composites [7], have good stab resistance, are lightweight and flexible, but require multi-layered lamination to attain a good stab resistance. Hence, many researchers still anticipate creating puncture resistant materials that can be lightweight and still attain good performance.…”

Section: Introductionmentioning

confidence: 99%

Fabric Composites Reinforced with Thermally Bonded and Irregularly Aligned Filaments: Preparation and Puncture Resistant Performance

et al. 2019

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This study proposes fabric composites with improved static and dynamic puncture via increasing a friction force to restrain the slide of filaments as well as the compression and abrasion between the fibers and the puncture probe. The the bi-layered shell layers of composite fabrics are composed of aramid staple fibers and nylon staple fibers and a layer of low-melting-point polyester (LPET). The nonwoven layer consisting of recycled aramid and nylon staple fibers provides a shear effect to dissipate part of the puncture energy. Reinforcing interlayers include a woven fabric and PET filaments that are circularly aggregated between the surface layers, providing isotropic filament reinforcement and strengthening the resistance against the tip of the puncture probe. The reinforcing filaments may slide after the employment of needle punching, and to compensate for this disadvantage, the LPET layers are used to thermal bond the composite fabrics and the total thickness is controlled at 2 mm. The thermally bonded fabric composites are evaluated in terms of puncture resistance, thereby examining the effects of fabric structure and thermal bonding. According to the test results, the optimal composite structure is the sample N/L/W/F/L/N, which was reinforced by the LPET adhesive layer and irregularly aligned filaments. The sample which used the LPET adhesive layer had a positive influence on static puncture resistance and dynamic puncture resistance, preventing the slide of filaments, but the poor interfacial combination only contributed to limited reinforcement.

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“…As shown in Fig. 18, carbide inclusion in the UHM-WPE matrix leads to an improvement in the material hardness by the effect of SiC hardness exhibiting high levels of 30.8 GPa [29]. This increase in the specimen hardness is beneficial for a limited range because at higher levels, the composites turn into brittle structures, which exhibit a loss of performance in terms of impact resistance.…”

Section: Effects Of Sic Additivesmentioning

confidence: 95%

Low-velocity impact performance of UHMWPE composites consolidated with carbide particles

Gürgen

2020

Archiv.Civ.Mech.Eng

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Ultra-high molecular weight polyethylene (UHMWPE) is one of important materials utilized against impacting threats. In this work, bulk UHMWPE specimens were fabricated in a compression molding chamber, and molding parameters such as pressure and temperature were varied in the specimen preparation stage to investigate the effect of molding parameters on the impact performance. In addition, silicon carbide fillers were included in the UHMWPE matrix to enhance the antiimpact properties of the specimens. From the results, high molding pressure provides enhanced impact resistance due to improved microstructural consolidation. On the other hand, molding temperature just above the melting point of polymer is much beneficial to the anti-impact behavior of the structures. Carbide fillers lead to an increase in the frictional interaction between the impactor and composites and thereby enhancing the impact resistance of the structures. However, the gain in the protective properties performance is restricted up to a certain amount of carbide loading because at higher filler ratios, the composites change from ductile to brittle characteristics. For this reason, crack growth susceptibility develops in the composites at excessive carbide loadings.

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The ballistic performance of aramid based fabrics impregnated with multi-phase shear thickening fluids

Cited by 155 publications

References 57 publications

Ballistic performance of Kevlar fabric impregnated with nanosilica/PEG shear thickening fluid

Ballistic performance of Kevlar fabric impregnated with nanosilica/PEG shear thickening fluid

Fabric Composites Reinforced with Thermally Bonded and Irregularly Aligned Filaments: Preparation and Puncture Resistant Performance

Low-velocity impact performance of UHMWPE composites consolidated with carbide particles

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