Mechanical, acoustic, and thermal performances of shear thickening fluid-filled rigid polyurethane foam composites: Effects of content of shear thickening fluid and particle size of silica

2019 ◽  
Vol 136 (18) ◽  
pp. 47359 ◽  
Author(s):  
Ting-Ting Li ◽  
Lei Ling ◽  
Xiaoxiao Wang ◽  
Qian Jiang ◽  
Bobo Liu ◽  
...  
Keyword(s):  
Particle Size ◽  
Polyurethane Foam ◽  
Shear Thickening ◽  
Rigid Polyurethane Foam ◽  
Shear Thickening Fluid

Influence of Components on the Rheological Property of Shear Thickening Polishing Slurry

2016 ◽  
Vol 1136 ◽  
pp. 461-465
Author(s):  
Bing Hai Lyu ◽  
Wei Tao Dai ◽  
Hai Zhou Weng ◽  
Min Li ◽  
Qian Fa Deng ◽  
...  
Keyword(s):  
Particle Size ◽  
Shear Rate ◽  
Rheological Property ◽  
Base Fluid ◽  
Abrasive Particle ◽  
Weight Ratio ◽  
Shear Thickening ◽  
Key Factors ◽  
Shear Thickening Fluid ◽  
High Efficient

Shear thickening polishing (STP) method was newly developed to achieve high efficient and high quality finishing of complex curved surface. The shear thickening fluid based slurry is one of the key factors in STP process. Viscosity of different shear thickening polishing slurry (STPS) was tested by rheometer in this study. The influences of dispersed particle size and concentration, abrasive material, abrasive particle size and concentration on the rheological property of STPS were analyzed. The results show that smaller dispersed particle (5.5 or 13μm in this study) and relative higher concentration (50-55 wt.%) are better for shear thickening effect of the base fluid. The viscosity of base fluid increases from 0.15-0.3 Pa·s to 0.8-1.1 Pa·s under high shear rate. The participation of Al2O3 and diamond abrasive changes the rheological property little, and the viscosity of STPS reaches the highest value 1.8 Pa·s at shear rate 300 s-1. But SiC abrasive obviously destroys the shear thickening effect. SPTS with different Al2O3 abrasive concentration in this study presents almost same viscosity curve. It is inferred that the number of the abrasive particle but not the weight ratio plays the role to effect the rheological property of STPS.

Impact response of shear thickening fluid filled polyurethane foam core sandwich composites

2020 ◽  
Vol 243 ◽  
pp. 112171 ◽  
Author(s):  
Cigdem Caglayan ◽  
Ipek Osken ◽  
Altug Ataalp ◽  
Halit S. Turkmen ◽  
Hulya Cebeci
Keyword(s):  
Polyurethane Foam ◽  
Shear Thickening ◽  
Impact Response ◽  
Foam Core ◽  
Sandwich Composites ◽  
Shear Thickening Fluid

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 Effect of particle size of fumed silica on the puncture resistance of fabrics impregnated with shear thickening fluid

2021 ◽  
Vol 16 ◽  
pp. 155892502110613
Author(s):  
Zhenqian Lu ◽  
Zishun Yuan ◽  
Jiawen Qiu
Keyword(s):  
Particle Size ◽  
Fumed Silica ◽  
Shear Thickening ◽  
Weight Fraction ◽  
Areal Density ◽  
Woven Fabrics ◽  
Body Armor ◽  
Shear Thickening Fluid ◽  
Puncture Resistance ◽  
Effect Of Particle Size

This paper presents an investigation into the effect of particle size of fumed silica on the puncture resistance of fabric impregnated with shear thickening fluid (STF). Two different types of STF were fabricated from fumed silica nanoparticles with particle sizes of 12 and 40 nm respectively. The effects of the particle size and weight fraction of the fumed silica on the rheological property were studied. STFs impregnated woven fabrics were fabricated and tested for stabbing resistance. STFs made of fumed silica with large particle size have better shear thickening effect. The stabbing resistant performance of STF impregnated fabrics improved notably with the same number of layers of fabric, and STFs impregnated fabric panels also outperform the untreated fabric panels with the same areal density. The results indicated that STFs made of fumed silica with larger particle size is able to fabricate a lighter soft body armor with higher stabbing protection.

scholarly journals Study on the mechanical properties of shear thickening fluid-filled polyurethane foam composites

2020 ◽  
Vol 6 (12) ◽  
pp. 125380
Author(s):  
Ping Wang ◽  
Yang Jiang ◽  
Xiaoke Liu ◽  
Kejing Yu ◽  
Kun Qian ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foam ◽  
Shear Thickening ◽  
Shear Thickening Fluid

Development of Flexible Extremities Protection utilizing Shear Thickening Fluid/Fabric Composites

2012 ◽  
Author(s):  
Mahesh Hosur ◽  
Norman Wagner ◽  
C. T. Sun ◽  
Vijaya Rangari ◽  
Jack Gillespie ◽  
...  
Keyword(s):  
Shear Thickening ◽  
Shear Thickening Fluid ◽  
Fabric Composites
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