https://doi.org/10.1140/epjp/s13360-022-03058-y
Regular Article
Dynamic response of shear thickening fluid and protective properties of impregnated Kevlar fabrics under impact loading
Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, 110159, Shenyang, China
a
hanyafei1979@126.com
c
tangenling@126.com
Received:
30
November
2021
Accepted:
8
July
2022
Published online:
29
July
2022
In this paper, shear thickening fluid (STF) is impact-loaded under the rigid constraint of an acrylic tube and uses the prepared STF-impregnated Kevlar fabric as the target. Kevlar fabric was impacted by one-stage light gas gun loading. The experimental results show that: for the dynamic response of STF, as the velocity of the aluminum projectile increases, the stress on the STF fluctuates and rises accordingly in the acrylic pipe side wall without a slot under the constraint conditions. When the velocity of the aluminum projectile is 12.53 m/s, the maximum dynamic viscosity and kinematic viscosity are 16,133.5 Pa·s and 8.385 m2/s, respectively. When the velocity of the aluminum projectile is 11.52 m/s, the corresponding maximum dynamic viscosity and kinematic viscosity are 31240 Pa·s and 16.32 m2/s, respectively, under the constraint of slotting on the side wall of the acrylic tube. For the protective performance of Kevlar fabric, with the increase in steel projectile’s speed, the stress of pure Kevlar fabric increases rapidly and then decreases slowly, and the deformations of the fabric in the axial and radial directions have been increased. For Kevlar fabric impregnated with STF as the target plate, when the impact speed is 124 m/s did not penetrate the fabric, the remaining velocity of the other experimental groups after the penetration of steel bullets significantly reduced, and compared with deformation degree of pure Kevlar fabric in the axial direction is smaller than that in the radial direction. Through experiments, it is shown that the introduction of STF increases the bulletproof performance of Kevlar fabric and provides a new idea for the practical application of STF.
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