Ballistic performance of <i>p</i>-aramid fabrics impregnated with shear thickening fluid; Part I – Effect of laminating sequence

Park, Jong Lyoul; Yoon, Byung Il; Paik, Jong Gyu; Kang, Tae Jin

doi:10.1177/0040517511420753

Cited by 105 publications

(51 citation statements)

References 18 publications

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“…The failure of the STF impregnated structure is by rupture of fibres and yarns rather than their slippage. Some other studies showed that the enhancement of impact resistance was due to higher inter-yarn friction in the fabric brought by STF with constraining the pull-out of yarns [18,[21][22][23].…”

Section: Introductionmentioning

confidence: 97%

Stabbing resistance of body armour panels impregnated with shear thickening fluid

Chen

Wang

et al. 2017

Composite Structures

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Please cite this article as: Xu, Y., Chen, X., Wang, Y., Yuan, Z., Stabbing r esistance of body ar mour panels impr egnated with shear thickening fluid, Composite Structures (2016), doi: http://dx.doi.org/10. 1016/ j.compstruct.2016.12.056 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Stabbing resistance of body armour panels impregnated with shear thickening fluid AbstractThis paper presents an investigation on the use of shear thickening fluid (STF) to improve stabbing resistance of soft ballistic body armour. STFs were produced from polyethylene glycol and silica nanoparticles. The effects of silica nanoparticle sizes and silica nanoparticle weight fraction were studied and STFs made with the different compositions were used to impregnate the Twaron ® woven fabrics. Systemic investigations into rheological behaviour of STF were carried out experimentally on STFs with different compositions. STF impregnated woven fabric panels were created and tested for stabbing resistance. Stabbing impact tests were conducted on 6 different types of STF impregnated fabric panels against 2 untreated fabric panels, and the results were studied against the benchmark fabrics without STF impregnation. Based on the same number of layers of fabric, the STF impregnation improves the stabbing resistance notably. For same panel areal density, the STF impregnated panels outperform the untreated fabric panel. The results of this research indicate the possibility of lighter ballistic panel materials for higher stabbing protection. It was also found that higher nanoparticle weight fraction and larger nanoparticle size of silica leads to better stabbing resistance performance among the STF impregnated panels.

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Section: Introductionmentioning

confidence: 97%

Stabbing resistance of body armour panels impregnated with shear thickening fluid

Chen

Wang

et al. 2017

Composite Structures

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“…e technology of AuTx has a large potential for development [1]. Nowadays the high interest for goods produced from aramide bres and fabrics has been proved by numerous research [2][3][4][5][6][7][8]. In this paper we examined the impregnation processes of high performance fabrics made from aramid bres designed for the manufacturing of athletic sportswear for extreme sports using the neural network mapping technique when searching for optimal conditions regarding the studied process.…”

Section: Introductionmentioning

confidence: 99%

New Approach for Optimising the Impregnations of Individual Batches of Aramid Fabrics

Fjodorova¹,

Novič²,

Diankova³

et al. 2015

TEK

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Innovate textile materials for special clothing are intended for providing trauma protection for the wearer. Fabrics made from high performance aramid fi bres are widely used nowadays for manufacturing athletic sportswear for extreme sports due to their high specifi c tensile modulus and strength. The aim of our study was to illustrate a new approach when searching for optimal settings for impregnating individual batches of textile materials on the basis of para aramid fi bres. We demonstrate a feed-forward bottleneck (FFBN) neural network mapping technique that makes it possible to see all optima (optimal settings for best quality) in the studied process. The selections of optimal settings are based on making decisions allowing us to choose optimal settings for processes in relation to the best quality and smallest (minimal) expense. This new approach can be applied for searching optimal settings regarding different chemical treatments. If a standard statistical regression model (in the cases of non-linear relationships) experiences lack of fi t, it can be successfully substituted with the FFBN neural network mapping technique. This method can also be recommended as a double check of a studied process when we use other approaches. Keywords: aramid fabrics, optimisation, impregnation, feed-forward bottleneck neural network, design of experiment Izvleček Inovativni tekstilni materiali za specialna oblačila so namenjeni za zaščito telesa pred poškodbami. Tkanine, narejene iz visokozmogljivih aramidnih vlaken, se dandanes na široko uporabljajo za izdelavo atletskih špor-tnih oblačil za ekstremne športe, ker imajo visoko natezno trdnost in elastični modul. Cilj naše študije je bil prikazati nov pristop pri iskanju optimalnih nastavitev za impregnacijo posameznih serij tekstilnih materialov na osnovi paraaramidnih vlaken. V raziskavah je predstavljena metoda 2D (2-dimenzionalnega) nevronskega mapiranja s tako imenovanim pristopom »feed foward bottleneck neural network (FFBN NN)«, ki omogoča vizualno ugotovitev optimalnih rešitev (optimalnih nastavitev procesa, pri katerih dobimo najboljšo kakovost

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“…Many studies have reported that the ballistic and stab performance of materials can be enhanced when impregnated with shear thickening fluid (STF) [2][3][4]. Since the shear thickening phenomenon is a non-Newtonian behavior widely observed in concentrated colloidal suspensions, STF is prepared by making the colloidal suspension of solid particles in a liquid.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, dense suspensions show more shear thickening effects. The dispersed colloidal particles form clusters, often denoted by the term 'hydroclusters' [3], leading to increased viscosity (i.e., shear thickening). Most previous studies on STF-treated fabrics have been focused on STF containing spherical silica particles because the suspension of silica particle in poly (ethylene glycol) (PEG) shows discontinuous shear thickening at low volume fraction about 0.5 [4].…”

Section: Introductionmentioning

confidence: 99%

Characterizations of STF-Treated Aramid Fabrics Using Picture Frame Test

Ahn

Han

et al. 2014

KEM

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Abstract. Shear thickening fluid (STF) is a non-Newtonian fluid featuring the increased viscosity upon high strain rate applied. Recently, STF-treated aramid fabrics have been researched to enhance the bulletproof efficiency maintaining the lightweight, however their shear properties including tow shearing, which significantly contribute to the bulletproof properties, have not been characterized, in particular under high shear strain rates. In this study, the shear properties of STF-treated aramid fabrics are characterized using a picture frame test. For this purpose, STF is prepared using polyethylene glycol and silica colloids and coated onto aramid fabrics. Varying the shear strain rate by controlling the pulling speed of the picture frame, the effect of STF on the shear properties of the aramid fabric is investigated. Finally, the shear properties of STF-treated aramid fabrics are predicted a multi-scale energy model and compared with the experiments. This prediction is then extended to cover such a high strain-rate situation as the bullet impacts, enabling to determine the mechanism behind the improved bulletproof performance of the STF-treated fabric.

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Ballistic performance of p-aramid fabrics impregnated with shear thickening fluid; Part I – Effect of laminating sequence

Cited by 105 publications

References 18 publications

Stabbing resistance of body armour panels impregnated with shear thickening fluid

Stabbing resistance of body armour panels impregnated with shear thickening fluid

New Approach for Optimising the Impregnations of Individual Batches of Aramid Fabrics

Characterizations of STF-Treated Aramid Fabrics Using Picture Frame Test

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