The stab resistance of fabrics impregnated with shear thickening fluids including various particle size of additives

2017 ◽  
Vol 94 ◽  
pp. 50-60 ◽  
Author(s):  
Selim Gürgen ◽  
Melih Cemal Kuşhan
Keyword(s):  
Particle Size ◽  
Shear Thickening ◽  
Shear Thickening Fluids ◽  
Stab Resistance

Investigating the quasi-static puncture resistance of p-aramid nanocomposite impregnated with the shear thickening fluid

2014 ◽  
Vol 33 (22) ◽  
pp. 2064-2072 ◽  
Author(s):  
Hamid Reza Baharvandi ◽  
Peiman Khaksari ◽  
Morteza Alebouyeh ◽  
Masoud Alizadeh ◽  
Jalal Khojasteh ◽  
...  
Keyword(s):  
Particle Size ◽  
Shear Thickening ◽  
Mechanical Mixing ◽  
Shear Thickening Fluid ◽  
Puncture Resistance ◽  
Viscosity Increase ◽  
Fluid Concentration ◽  
Shear Thickening Fluids ◽  
The Difference ◽  
American Society

The effect of impregnating p-aramid fabrics with shear thickening fluids on their quasi-static puncture resistance performance has been investigated. To prepare the shear thickening fluid, 12 and 60-nm silica particles have been dispersed in polyethylene glycol by means of mechanical mixing. The results of rheological tests indicate that the reduction of particle size leads to the increase of suspension viscosity, increase of critical shear rate, and the diminishing of the frequency of transition to elastic state for the shear thickening fluids. Samples of p-aramid impregnated fabrics were subjected to the quasi-static puncture resistance test according to the American Society for Testing and Materials standard D6264. The quasi-static puncture resistance increased 4.5 times for samples with 35 wt% silica concentration relative to the neat sample. In particular, with the reduction of particle size, the samples undergo less deformation and can withstand larger loads at each shear thickening fluid concentration. However, at low and medium concentrations (15 and 25 wt%), the reduction in the particle size has a large effect on the load-bearing capacity of the fabrics. But in the case of 35 wt% concentration for both the 12- and 60-nm particles, the difference between maximum loads withstood by the fabric is negligible.

The Ballistic Performance of Multi-Layer Kevlar Fabrics Impregnated with Shear Thickening Fluids

2015 ◽  
Vol 782 ◽  
pp. 153-157 ◽  
Author(s):  
Yan Wang ◽  
Shu Kui Li ◽  
Xin Ya Feng
Keyword(s):  
Particle Size ◽  
Coupling Effect ◽  
Shear Thickening ◽  
Silica Particles ◽  
Ballistic Performance ◽  
Shear Thickening Fluid ◽  
Aramid Fabric ◽  
Shear Thickening Fluids ◽  
Ballistic Properties ◽  
Ballistic Test

This study investigates the ballistic penetration performance of aramid fabric impregnated with shear thickening fluid. The ballistic test was conducted at impact velocity of 445 m/s, and three types of shear thickening fluids prepared with silica particles of different sizes (200nm, 340nm and 480nm) are involved. The results demonstrate an enhancement in ballistic properties of fabric due to the impregnation of shear thickening fluids. The fabrics with smaller particle size show better ballistic performance. Microscopic observation of aramid fabric reveals that shear thickening fluids with smaller silica particles have a better adhesion on and between yarns, enhancinging the coupling effect between yarns. The corresponding mechanism was discussed in the paper.

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.

The effect of particle size and concentration on the ballistic resistance of different shear thickening fluids

2020 ◽  
Vol 28 ◽  
pp. 1472-1476
Author(s):  
Gunjan Grover ◽  
Sanjeev K. Verma ◽  
Anupama Thakur ◽  
Ipsita Biswas ◽  
Debarati Bhatacharjee
Keyword(s):  
Particle Size ◽  
Shear Thickening ◽  
Ballistic Resistance ◽  
Shear Thickening Fluids ◽  
Effect Of Particle Size

scholarly journals Effect of SiO2 Particle Size and Length of Poly(Propylene Glycol) Chain on Rheological Properties of Shear Thickening Fluids

2016 ◽  
Vol 61 (3) ◽  
pp. 1511-1514 ◽  
Author(s):  
A. Antosik ◽  
M. Głuszek ◽  
R. Żurowski ◽  
M. Szafran
Keyword(s):  
Particle Size ◽  
Rheological Properties ◽  
Propylene Glycol ◽  
Molar Mass ◽  
Shear Thickening ◽  
Polymeric Chain ◽  
Carrier Fluid ◽  
Shear Thickening Fluids ◽  
Effect Of Particle Size ◽  
Poly Propylene

AbstractThe rheological properties of shear thickening fluids based on silica powder of particles size in range 0.10 – 2.80 μm and poly(propylene glycol) of 425, 1000, 2000 g/mol molar mass were investigated. The effect of particle size and the length of the polymeric chain was considered. The objective of this study was to understand basic trends of physicochemical properties of used materials on the onset and the maximum of shear thickening and dilatant effect. Outcome of the research suggested that an increase in the particle size caused a decrease in dilatant effect and shift towards higher shear rate values. Application of carrier fluid of higher molar mass allowed to increase dilatant effect but it resulted in the increase of the initial viscosity of the fluid.

scholarly journals Rheology Based Design of Shear Thickening Fluid for Soft Body Armor Applications

2019 ◽  
Vol 64 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Balasubrahmanya Harish Manukonda ◽  
Victor Avisek Chatterjee ◽  
Sanjeev Kumar Verma ◽  
Debarati Bhattacharjee ◽  
Ipsita Biswas ◽  
...  
Keyword(s):  
Particle Size ◽  
Shear Thickening ◽  
High Strength ◽  
Packing Fraction ◽  
Continuous Phase ◽  
Body Armor ◽  
Rheological Characterization ◽  
Ballistic Performance ◽  
Ballistic Resistance ◽  
Shear Thickening Fluids

The ballistic resistance of high-strength fabrics improves upon impregnation with Shear Thickening Fluids (STFs). The performance of such STF treated fabrics depends on the rheological properties of the STF which in turn are governed by the physicochemical properties of the STF. The present study utilizes rheological characterization of shear thickening silica-polyethylene glycol dispersions (of different material configurations in terms of packing fraction, particle size and continuous phase viscosity) to assess their performance and obtain the best STF material configuration for ballistic body armor applications based on the design criteria proposed herein. The ballistic performance assessment results showed that the STFs with high packing fractions which thicken discontinuously, are highly effective compared to the continuously shear thickening fluids. Furthermore, the use of smaller particle size dispersed phase in the STF formulation was determined to be economical. Also, the use of lower molecular weight dispersion medium was suggested as it allows for a broader working temperature range of the STF. Additionally, the technological issues associated with the development and the practical application of STF-Armor were addressed.

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.

Advanced Stab Resistance Fabrics Utilizing Shear Thickening Fluids

2011 ◽  
Vol 299-300 ◽  
pp. 73-76 ◽  
Author(s):  
Zhen Yu Song ◽  
Chen Zhang ◽  
Meng Song ◽  
Si Zhu Wu
Keyword(s):  
Molecular Weight ◽  
Shear Thickening ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Woven Fabrics ◽  
Flexible Body ◽  
Equivalent Weight ◽  
Novel Materials ◽  
Ultrahigh Molecular Weight ◽  
Shear Thickening Fluids ◽  
Stab Resistance

A series of shear thickening fluids (STF) were prepared and characterized by Rheometer. The stab resistance of Kevlar and ultrahigh molecular weight polyethylene (UHMWPE) non-woven fabrics impregnated with STF were investigated and found to exhibit significant improvements over neat fabric targets of equivalent weight. Specifically, dramatic improvements in stab resistance (knife threat) were observed. These novel materials could be potentially used to fabricate flexible body armors which provide improved protection against both stab and ballistic threats.

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