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首页> 外文期刊>International journal of impact engineering >Empirical study of the high velocity impact energy absorption characteristics of shear thickening fluid (STF) impregnated Kevlar fabric
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Empirical study of the high velocity impact energy absorption characteristics of shear thickening fluid (STF) impregnated Kevlar fabric

机译：剪切增稠剂（STF）浸渍凯夫拉纤维织物的高速冲击能量吸收特性的实证研究

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The application of shear thickening fluids (STF) allows further enhancement of ballistic resistance without hindering flexibility by the fabric impregnation process. Studies on the effect of STF impregnation on fabric ballistic performance have been limited to the impact velocity range of below 700 m/s. Considering the muzzle velocity of modern rifles with high performance cartridges, investigation of the high velocity impact energy absorption characteristics of neat and STF impregnated Kevlar fabric specimens was conducted in this study. 100 nm diameter silica nanoparticles were dispersed in a solution of polyethylene glycol (PEG) and diluted with methanol for effective impregnation to the Kevlar fabric. High velocity impact experiments with projectile velocities between 1 and 2 km/s were conducted using a 2-stage light gas gun. The experiments revealed that the STF impregnation provides substantial energy absorption enhancement in terms of volume, areal density, and fabrication material cost. Thinner shielding configurations with equivalent energy absorption performance was found to be possible through SIT impregnation as the 5 layer STF impregnated Kevlar configuration showed the same energy absorption as the 8 layer neat Kevlar while the energy absorption normalized for areal density and thickness revealed that the STF impregnated Kevlar provides an approximately 70% enhanced specific energy absorption performance over neat Kevlar. (C) 2014 Elsevier Ltd. All rights reserved.
机译：剪切增稠液（STF）的应用可进一步增强防弹性能，而不会因织物浸渍过程而影响柔韧性。关于STF浸渍对织物防弹性能影响的研究仅限于700 m / s以下的冲击速度范围。考虑到带有高性能弹药筒的现代步枪的枪口速度，本研究对纯净和STF浸渍的凯夫拉织物标本的高速冲击能量吸收特性进行了研究。将直径为100 nm的二氧化硅纳米颗粒分散在聚乙二醇（PEG）溶液中，并用甲醇稀释，以有效地浸渍到Kevlar织物上。使用2级轻型气枪进行了射弹速度为1至2 km / s的高速冲击实验。实验表明，STF浸渍在体积，面密度和制造材料成本方面提供了显着的能量吸收增强。发现通过SIT浸渍可以实现具有同等能量吸收性能的更薄的屏蔽结构，因为5层STF浸渍的Kevlar构造显示出与8层纯Kevlar相同的能量吸收，而按面密度和厚度归一化的能量吸收表明STF浸渍了与纯净的凯夫拉纤维相比，凯夫拉纤维的吸收比能量提高了约70％。 （C）2014 Elsevier Ltd.保留所有权利。

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