Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (03): 106-112.doi: 10.13475/j.fzxb.20190506107

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Effect of shear thickening fluid on quasi-static stab resistance of aramid-based soft armor materials

LI Danyang1,2, WANG Rui1,2(), LIU Xing1,2, ZHANG Shujie1,2, XIA Zhaopeng1,2, YAN Ruosi3, DAI Erqing4   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. Key Laboratory of Advanced Textile Composites, Ministry of Education, Tiangong University, Tianjin 300387, China
    3. College of Textile and Garments, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China
    4. Affiliated Hospital of Logistics University of People's Armed Police Force, Tianjin 300162, China
  • Received:2019-05-24 Revised:2019-12-14 Online:2020-03-15 Published:2020-03-27
  • Contact: WANG Rui E-mail:wangrui@tiangong.edu.cn

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Abstract:

In order to achieve the lightweight of stab-resistance fabric with improved wearability, shear thickening fluid (STF) was used to impregnate the aramid fabrics with different structures to fabricate the flexible body armor and the influence of different structures on the stab resistance of STF/aramid fabrics was investigated. The rheological property of STF, the morphology, yarn pull-out force and spike and knife stabbing performance of STF/aramid fabrics were characterized by Malvin rotational rheometer, scanning electron microscopy and tensile tester. The results indicate that the shear thickening behavior increases with the mass fraction of dispersion phase increasing. The STF impregnated fabric has significantly improved the stab resistance performance, and the STF/plain-fabric with high warp and weft density exhibits better spike and knife stab performance with the maximum spike and knife stab resistance forces reaching 993.75 N and 687.50 N respectively. Because the shear thickening effect can effectively hinder yarn slippage and the yarn friction increases as the number of fabric crossover points increasing. Moreover, the knife stab performance of STF/twill-fabric is most noticeably enhanced by 387% because the longer floating line can resist the cutting action of the knife blade.

Key words: shear thickening fluid, aramid fabric, fabric structure, stab-resistance, personal protective material

CLC Number: 

  • TB332

Fig.1

Weave structures of fabric. (a) Plain; (b) Twill"

Tab.1

Fabric specification parameters"

织物
编号		 组织
结构		 密度/(根·(10 cm)-1) 面密度/
(g·m-2)
经向 纬向
1# 平纹 56 56 120
2# 平纹 87 87 200
3# 斜纹 87 87 200

Fig.2

Schematic illustration of yarn pull-out test"

Fig.3

Specifications and images of spike and knife. (a) Specification of spike; (b) Image of spike;(c) Specification of knife; (d) Image of knife"

Fig.4

Schematic illustration of quasi-static stab test"

Fig.5

Steady rheological curve of STFs with different fumed silica mass fraction"

Fig.6

Surface SEM images of aramid fabrics and STF/aramid fabrics (×2 000)"

Fig.7

SEM images of aramid fabrics and STF/aramid fabrics (×200)"

Fig.8

Peak pull-out force and weight gain rate of fabrics after STF impregnation"

Fig.9

Cone stab resistance of aramid and STF/ aramid fabrics. (a) Force-displacement curves for quasi-static spike stab; (b) Energy dissipation during impact process and peak force of neat aramid and STF/aramid fabrics"

Fig.10

Damage diagram of aramid and STF/aramid fabric after pricking"

Fig.11

Stab resistance of aramid and STF/aramid fabrics. (a) Force-displacement curves for quasi-static knife stab; (b) Energy dissipation during impact process and peak force"

Fig.12

Damage diagram of aramid and STF/aramid fabric after stabbing"

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