Effect of the yarn pull-out velocity of shear thickening fluid-impregnated Kevlar fabric on the coefficient of friction

Alikarami, Sh.; Kordani, Naser; Sadough-Vanini, A; Amiri, Hamid Reza

doi:10.1007/s12206-016-0716-2

Cited by 23 publications

(11 citation statements)

References 16 publications

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“…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. Comparing the yarn pull-out force values indicates that the STF-treated samples have the highest value and is approximately three times higher than that of the neat sample.…”

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

126

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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

126

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“…However, the results exhibited a decrease in the coefficient of friction with increasing pull-out speed. Alikarami et al (2016) justified this unanticipated decrease in the frictional coefficient by claiming that the above-mentioned pull-out speeds were located in the shear thinning region. The low velocity used is unlikely to have exceeded the critical shear rate necessary to invoke shear thickening.…”

Section: Incorporation Of the Effects Of Stf In The Modelling Of Fabricsmentioning

confidence: 99%

“…However, Alikarami et al (2016), in a later study, used this analytical model to estimate the coefficient of friction between yarns in an STF-impregnated woven fabric. They further studied the effect of yarn pull-out velocity of STF-impregnated Kevlar on the frictional coefficient.…”

Section: Incorporation Of the Effects Of Stf In The Modelling Of Fabricsmentioning

confidence: 99%

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Incorporation of shear thickening fluid effects into computational modelling of woven fabrics subjected to impact loading: A review

Weerasinghe

Mohotti

Anderson³

2019

International Journal of Protective Structures

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Soft armour consisting of multi-layered high-performance fabrics are a popular choice for personal protection. Extensive work done in the last few decades suggests that shear thickening fluids improve the impact resistance of woven fabrics. Shear thickening fluid–impregnated fabrics have been proven as an ideal candidate for producing comfortable, high-performance soft body armour. However, the mechanism of defeating a projectile using a shear thickening fluid–impregnated multi-layered fabric is not fully understood and can be considered as a gap in the research done on the improvement of soft armour. Even though considerable progress has been achieved on dry fabrics, limited studies have been performed on shear thickening fluid–impregnated fabrics. The knowledge of simulation of multi-layered fabric armour is not well developed. The complexity in creating the geometry of the yarns, incorporating friction between yarns and initial pre-tension between yarns due to weaving patterns make the numerical modelling a complex process. In addition, the existing knowledge in this area is widely dispersed in the published literature and requires synthesis to enhance the development of shear thickening fluid–impregnated fabrics. Therefore, this article aims to provide a comprehensive review of the current methods of modelling shear thickening fluid–impregnated fabrics with a critical analysis of the techniques used. The review is preceded by an overview of shear thickening behaviour and related mechanisms, followed by a discussion of innovative approaches in numerical modelling of fabrics. A novel state-of-the-art means of modelling shear thickening fluid–impregnated fabrics is proposed in conclusion of the review of current methods. A short case study is also presented using the proposed approach of modelling.

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“…Equivalent plastic strain (EQPS), design of experiment (DOE), average temperature and response surface method (RSM) were used to accomplish the optimization process. DOE is a quality optimization process which determines the most influential variables in the process and improves them accordingly to affect the outputs in the experiments (Alikarami et al, 2016). The Johnson-Cook constitutive model was used as the material card for the analysis as it had been widely used to simulate impact under larger deformations.…”

Section: Numerical Modellingmentioning

confidence: 99%

Ballistic performance of multi-metal systems

Ranaweera

Weerasinghe

Fernando

et al. 2020

International Journal of Protective Structures

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Ballistic resistance enhancement of armours and structures has been a prominent area of research over the years. Monolithic metallic plates have been the preferred choice for armours against high-velocity projectiles. High-strength steel is a popular choice for such systems. However, the high areal density deters in accommodating such systems in practical applications which require lightweight products. On the contrary, multi-metallic systems produced by the combination of low-density materials with similar or superior ballistic resistance as their monolithic counterparts have become attractive candidates in defence applications. However, only a limited number of comprehensive studies on the ballistic performance of multi-metal multi-layered targets are available in the literature. Moreover, these studies have drawn contradictory conclusions on the optimum arrangement of different layers and materials within the systems. In addition, existing knowledge in this area is scattered in the literature and there is a need to collate them to enhance the development of multi-metal multi-layered ballistic-resistant plate systems in order to be optimised for ballistic-related armour. This article aims to provide a comprehensive review of the effect of different metals, thickness, fracture mechanisms, feasibility of the connection types and the order of the metallic plates within targets on the ballistic performance.

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Effect of the yarn pull-out velocity of shear thickening fluid-impregnated Kevlar fabric on the coefficient of friction

Cited by 23 publications

References 16 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

Incorporation of shear thickening fluid effects into computational modelling of woven fabrics subjected to impact loading: A review

Ballistic performance of multi-metal systems

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