Effect of silica weight fraction on rheological and quasi-static puncture characteristics of shear thickening fluid-treated Twaron® composite

Abstract

Intelligent energy shunting fluid/fabric base structure which utilizes well-processed shear thickening fluid has been developed. The shear thickening fluid has been synthesized by a powerful mechanical stirrer to disperse 12 nm silica particles into polyethylene glycol 200 g/mol at three concentration levels from low to near maximum packing as 15, 25 and 35 wt%. Examining the rheological behavior of the shear thickening fluid indicates that the increase of shear thickening fluid concentration leads to significant increase in the suspension's initial, critical and ultimate (up to 10 4 Pa.s) viscosities, reduction of the critical shear rate, increase of viscoelastic modulus and instability of the suspension. The quasi-static puncture test results demonstrate with the increase of shear thickening fluid concentration, the maximum bearable load by the 15, 25 and 35 wt% shear thickening fluids-treated Twaron Õ composites increases by 132, 315 and 362%, and the energy absorption increases by 143, 159 and 209%, respectively, compared to the neat fabric. Regarding penetrator structure and dimension, by using rounded penetrators, windowing and pull-out mechanisms would be expected at low velocities. However, sharpnosed penetrators most likely cause yarns to push aside that is not taken into account Downloaded from as a perfect criteria for investigation of puncture resistance performance. Also, larger penetrators have a larger presented area of impact and, as a result, break more number of yarns to penetrate the fabric.

The influences of particle–particle interaction and viscosity of carrier fluid on characteristics of silica and calcium carbonate suspensions-coated Twaron® composite

“…The strong shear thickening response for the STFs demonstrated in Figure 3(a) and 3(b) could lead to substantial load coupling between yarns, and hence the excessive forces required for fabric failure. [10,50,51] In addition to shear thickening characteristics, the improvement of interface friction also attributes to particle characteristics. In fact, the second reason is that the silica nanoparticles are harder than calcium carbonate nanoparticles.…”

New Research Trends for Textiles

“…Shear thickening fabrics are another recent development for PPE, especially for impact protection. For instance, para-aramid fabrics were impregnated with a shear thickening fluid made of silica nanoparticles dispersed in polypropylene glycol [191] and polyethylene glycol [192]. An increase in the load at penetration compared with untreated fabrics was achieved with spiked and rounded impactors.…”

Reinforcement effect of shear thickening fluid on impact properties of aramid, basalt, and carbon fiber reinforced polymer using a split Hopkinson pressure bar

“…While the research mentioned above enhances the mechanical properties of FRP under low-velocity impact, its impact resistance poses challenges in high-velocity impact scenarios. A recent noteworthy development involves a substantial increase in the viscosity of shear thickening fluid (STF), which presents significant potential in areas such as human protection, [17][18][19][20] impact resistance, [21][22][23][24][25] and vibration control. [26][27][28][29] This potential stems from the ability of STF to absorb impact energy through its shear thickening mechanism.…”