Energy Absorption in a Shear-Thickening Fluid

Afeshejani, Seyed Hossein Amiri; Sabet, S. A. R.; Zeynali, Mohammad Ebrahim; Atai, Mohammad

doi:10.1007/s11665-014-1217-z

Cited by 38 publications

(16 citation statements)

References 24 publications

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“…Therefore, STF forms a noncontinuous layer on fabrics, and only small drops of STF are located between the yarns within the fabrics. As given in previous works, [35][36][37] major contribution of STF impregnation to the impact resistance of fabrics is friction increase between the yarns. However, the role of pure shear thickening in impact resistance is not fully understood.…”

Section: Introductionmentioning

confidence: 62%

An investigation on composite laminates including shear thickening fluid under stab condition

Gürgen

2018

Journal of Composite Materials

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Shear thickening fluids have been extensively utilized in composite laminate structures to enhance the impact resistance in the last decade. Despite the contribution of shear thickening fluids to the protective systems, the mechanism behind the energy absorption behavior of shear thickening fluids is not fully understood. In the present study, various configurations of composite laminates were prepared and these structures were investigated under low velocity stab conditions. Contrary to the common idea of shear thickening fluid impregnation for fabrics, shear thickening fluids were used in bulk form and by means of this, pure contribution of shear thickening behavior to the energy absorption was investigated. To hold the bulk shear thickening fluids in the composite laminates, Lantor Soric SF honeycomb layers were filled with shear thickening fluids and Twaron fabrics were plied in the structures as the reinforcement. As a result of this study, it is stated that shear thickening behavior is insufficient to effectively improve the energy absorption performance of composite laminates; however, shear thickening fluids are beneficial to fabric based composites because the inter-yarn friction of fabrics is enhanced using shear thickening fluids as an impregnation agent rather than a bulk form.

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Section: Introductionmentioning

confidence: 62%

An investigation on composite laminates including shear thickening fluid under stab condition

Gürgen

2018

Journal of Composite Materials

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“…The procedure above followed the premises from the current literature. [15][16][17] Subsequently, the ethanol was removed by evaporation in a laboratory stenter machine at 75 C for 90 s, producing different compositions of STF (C1, C2, and C3), according to Table 1. 18 Impregnation STF-fabric…”

Section: Non-newtonian Fluid Preparationmentioning

confidence: 99%

Experimental analysis of the impact protection properties for Kevlar® fabrics under different orientation layers and non-Newtonian fluid compositions

Santos

Fonseca

et al. 2020

Journal of Composite Materials

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Use of colloidal silica suspensions impregnated in Kevlar® fabrics is new avant-garde of protection equipment for stab wounds and piercing objects. Kevlar® fabrics impregnated with non-Newtonian fluids have been used for protection against sharp blows, mainly due to their lightweight, good flexibility, and superior resistance properties. The aims of this investigation are to demonstrate that Kevlar® fabric impregnated with shear thickening fluids could be improved its performance through the use Aminopropyltrimethoxysilane, as well as by increasing the concentration of silica nanoparticles in its composition. Friction tests on yarns showed that Kevlar® yarns with shear thickening fluids (sample C3—25% Silica and 75%polyethylene glycol with 38% aminopropyltrimethoxysilane), presented higher strength values (10.5 N) when compared with other samples. Impact resistance tests showed that Kevlar® samples with highest concentration shear thickening fluids nanoparticles and oriented fabric layers (C3 OR) presented better performance regarding to penetration depth of stabs P1 (17 mm), S1 (18 mm) and as well as residual energy dissipation, when compared with the standard and other samples. Addition of shear thickening fluids cause reduction in the flexibility of the Kevlar® fabrics, producing sample with 42.74% less flexibility than the standard sample (C3). Adhesion tests for C3 samples exhibited more stable wettability and spreading rate, i.e., a greater adhesion of shear thickening fluids in Kevlar® fabrics than other samples due to its composition (higher concentration of nanoparticles and superior amount of silane agent). Finally, results showed that the shear thickening fluids composition as well as Kevlar® layers orientation should be used to improve the performance of Kevlar® fabrics under impact tests.

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“…Equation (1) Twaron fabric [29] Previous work done by Yu et al [30] on stab performance of STF impregnated with glass fabrics found that performance of these fabrics can be improved significantly with present of STF. In their study, neat fabric and STF impregnated fabric (STF-fabric) were tested using quasi-static stab test.…”

Section: Stf Impregnated Fabricsmentioning

confidence: 99%

A Review on Stab and Spike Resistance Performance of Shear Thickening Fluids (STF) Impregnated Fabrics

2017

May 22-24, 2017 Kuala Lumpur (Malaysia) ICLTET-2017, ACBES-2017

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Abstract-This paper provides a brief review on relevant literature related to shear thickening fluids (STF) impregnated fabrics on stab and spike resistance performance. Soft body armours consist of multiple layers of high performance fabric to stop stab and spike threats. To reduce the number of fabric layers on soft body armours, STF has been introduced. STF transforms from liquid state to a solidlike state under applied stress and return to its original state after stress is removed. Hence, several studies were conducted to enhance the stab and spike resistance of fabrics by exploiting STF unique properties. The performance of STF-fabric that affected by several factors, such as fibre properties, fabric architectures, STF rheological properties (particles size, shape and solid volume fraction), STF synthesis and impregnation process will be reviewed in this paper.

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Energy Absorption in a Shear-Thickening Fluid

Cited by 38 publications

References 24 publications

An investigation on composite laminates including shear thickening fluid under stab condition

An investigation on composite laminates including shear thickening fluid under stab condition

Experimental analysis of the impact protection properties for Kevlar® fabrics under different orientation layers and non-Newtonian fluid compositions

A Review on Stab and Spike Resistance Performance of Shear Thickening Fluids (STF) Impregnated Fabrics

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