Stab resistance of shear thickening fluid (STF)-treated fabrics

2007 ◽  
Vol 67 (3-4) ◽  
pp. 565-578 ◽  
Author(s):  
M.J. Decker ◽  
C.J. Halbach ◽  
C.H. Nam ◽  
N.J. Wagner ◽  
E.D. Wetzel
Keyword(s):  
Shear Thickening ◽  
Shear Thickening Fluid ◽  
Stab Resistance

scholarly journals Shear-Thickening Fluid Using Oxygen-Plasma-Modified Multi-Walled Carbon Nanotubes to Improve the Quasi-Static Stab Resistance of Kevlar Fabrics

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1356 ◽  
Author(s):  
Danyang Li ◽  
Rui Wang ◽  
Xing Liu ◽  
Shu Fang ◽  
Yanli Sun
Keyword(s):  
Carbon Nanotubes ◽  
Loss Modulus ◽  
Shear Thickening ◽  
Woven Fabrics ◽  
Body Armor ◽  
Shear Thickening Fluid ◽  
Pull Out ◽  
Stab Resistance ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The excellent mechanical property and light weight of protective materials are vital for practical application in body armor. In this study, O2-plasma-modified multi-walled carbon nanotubes (M-MWNTs) were introduced into shear-thickening fluid (STF)-impregnated Kevlar woven fabrics to increase the quasi-static stab resistance and decrease the composite weight. The rheological test showed that the addition of 0.06 wt. % M-MWNT caused a marked increase in the peak viscosity from 1563 to 3417 pa·s and a decrease in the critical shear rate from 14.68 s−1 to 2.53 s−1. The storage modulus (G′) and loss modulus (G″) showed a higher degree of abrupt increase with the increase of shear stress. The yarn pull-out test showed that the yarn friction of M-MWNT/STF/Kevlar fabrics was far superior to the original fabrics. Importantly, under similar areal density, the M-MWNT/STF/Kevlar fabrics could resist 1261.4 N quasi-static stab force and absorb 41.3 J energy, which were much higher than neat Kevlar fabrics. The results of this research indicated that quasi-static stab resistance was improved by M-MWNTs, which was attributed to the excellent shear-thickening effect and the high yarn friction. Therefore, M-MWNT/STF/Kevlar fabrics have a broad prospect in the fields of body protection.

Rheological response and quasi-static stab resistance of STF/MWCNTs-impregnated aramid fabrics with different textures

2019 ◽  
Vol 50 (3) ◽  
pp. 380-397
Author(s):  
Ting-Ting Li ◽  
Xixi Cen ◽  
Haokai Peng ◽  
Haitao Ren ◽  
Lianhe Han ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Shear Thickening ◽  
Critical Shear Rate ◽  
Shear Thickening Fluid ◽  
Aramid Fabric ◽  
Stab Resistance ◽  
Multi Walled Carbon Nanotubes ◽  
Aramid Fabrics ◽  
Self Protection ◽  
Walled Carbon Nanotubes

Terrorist attacks occur constantly, which subsequently arouses awareness of self-protection. In order to alleviate the harm caused by sharp objects of knives and daggers, a design of flexible stab-resistant materials that are impregnated with the shear thickening fluid (STF)/multi-walled carbon nanotubes (MWCNTs) system and different texture of fabrics is presented. STF/MWCNTs are composed of polyethylene glycol (PEG 200) as the dispersion medium and silica (SiO2) of 12 nm and 75 nm as disperse phase as well as MWCNTs as supplementary reinforcement, in expectation to provide the aramid fabrics with high strengths, low critical shear rate, and a short thickening response time. The textures of aramid fabrics—plain (P), twill (T), satin (S), or basket (B) weave—are saturated in the STF/MWCNTs system. The synergetic influences of silica size and texture on tensile strength, quasi-static knife, and spike stab resistances of the STF/MWCNTs-impregnated aramid fabrics are examined. Results show that the plain aramid fabric immersed in the STF/MWCNTs system containing 12 nm SiO2(SM12) exhibit the maximum tensile strength and quasi-static knife stab resistance, 14.7 MPa and 8.9 MPa, respectively, which is 1.15 and 1.43 times higher than pure aramid fabrics. Moreover, the basket-weave aramid fabric immersed in the STF/MWCNTs system containing 12 nm SiO2have the maximum quasi-static spike stab resistance of 17.12 MPa compared to other textures of fabrics, which is 1.05 times higher than those immersed in the 75 nm SiO2STF/MWCNTs (SM75) system and 1.33 times higher than that of pure basket aramid fabrics.

scholarly journals Modification and integration of shear thickening fluids into high performance fabrics

2021 ◽  
Author(s):  
Jakub Mikolaj Szczepanski
Keyword(s):  
High Performance ◽  
Chemical Properties ◽  
Shear Thickening ◽  
Innovative Technology ◽  
Chemical Compositions ◽  
Shear Thickening Fluid ◽  
Puncture Resistance ◽  
Body Armour ◽  
Shear Thickening Fluids ◽  
Stab Resistance

Great interest has aroused in developing the next generation body armour based on the incorporation of a Shear Thickening Fluid (STF) into high performance fabrics (Kevlar®, UHMWPE). This innovative technoloy allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. This innovative technology allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. The furrent research was undertaken to evaluate the stab resistance and the chemical properties of types of high performance fabrics, Kevlar and Ultra Hight Molecular Weight Polyethylene (UHMWPE), impregnated with several types of shear thickening fluids. The stab resistance properties of all samples were tested using drop tower and quasistatic testing apparatuses. Chemical compositions and microscopic structures were analyzed with Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy Dispersive Spectroscopy. The current study demonstrated the importance of incorporating Shear Thickening Fluid into woven high performance fibres. The results clearly display a significant enhancement in puncture resistance ony of Kevlar® fabrics impregnated with different combination of STFs.

Effects of bi-particle-sized shear thickening fluid on rheological behaviors and stab resistance of Kevlar fabrics

2020 ◽  
pp. 152808372090740
Author(s):  
Xiayun Zhang ◽  
Ting-Ting Li ◽  
Hao-Kai Peng ◽  
Zhike Wang ◽  
Junli Huo ◽  
...  
Keyword(s):  
Shear Thickening ◽  
Shear Thickening Fluid ◽  
Rheological Behaviors ◽  
Stab Resistance

scholarly journals Dynamic/quasi-static stab-resistance and mechanical properties of soft body armour composites constructed from Kevlar fabrics and shear thickening fluids

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39803-39813 ◽  
Author(s):  
Jianbin Qin ◽  
Guangcheng Zhang ◽  
Lisheng Zhou ◽  
Jiantong Li ◽  
Xuetao Shi
Keyword(s):  
Mechanical Properties ◽  
Shear Thickening ◽  
Soft Body ◽  
Shear Thickening Fluid ◽  
Body Armour ◽  
Shear Thickening Fluids ◽  
Stab Resistance

Soft body armour composites were constructed by combining Kevlar fabrics with different quantities of shear thickening fluid (STF).

scholarly journals Modification and integration of shear thickening fluids into high performance fabrics

2021 ◽  
Author(s):  
Jakub Mikolaj Szczepanski
Keyword(s):  
High Performance ◽  
Chemical Properties ◽  
Shear Thickening ◽  
Innovative Technology ◽  
Chemical Compositions ◽  
Shear Thickening Fluid ◽  
Puncture Resistance ◽  
Body Armour ◽  
Shear Thickening Fluids ◽  
Stab Resistance

Great interest has aroused in developing the next generation body armour based on the incorporation of a Shear Thickening Fluid (STF) into high performance fabrics (Kevlar®, UHMWPE). This innovative technoloy allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. This innovative technology allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. The furrent research was undertaken to evaluate the stab resistance and the chemical properties of types of high performance fabrics, Kevlar and Ultra Hight Molecular Weight Polyethylene (UHMWPE), impregnated with several types of shear thickening fluids. The stab resistance properties of all samples were tested using drop tower and quasistatic testing apparatuses. Chemical compositions and microscopic structures were analyzed with Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy Dispersive Spectroscopy. The current study demonstrated the importance of incorporating Shear Thickening Fluid into woven high performance fibres. The results clearly display a significant enhancement in puncture resistance ony of Kevlar® fabrics impregnated with different combination of STFs.

Investigation of the effect of para-aramid fabric impregnation with shear thickening fluid on quasi-static stab resistance

2014 ◽  
Vol 84 (15) ◽  
pp. 1569-1577 ◽  
Author(s):  
Dorota Zielinska ◽  
Bogumila Delczyk-Olejniczak ◽  
Lukasz Wierzbicki ◽  
Bo ż ena Wilbik-Hałgas ◽  
Marcin Henryk Struszczyk ◽  
...  
Keyword(s):  
Shear Thickening ◽  
Shear Thickening Fluid ◽  
Aramid Fabric ◽  
Stab Resistance
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