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首页> 外文期刊>Journal of Aerospace Sciences and Technologies >IMPACT PERFORMANCE OF KEVLAR FABRICS WITH SHEAR THICKENING FLUID
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IMPACT PERFORMANCE OF KEVLAR FABRICS WITH SHEAR THICKENING FLUID

机译：剪切增稠流体对凯夫特纤维的冲击性能

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摘要

In modern day warfare, flexible and light weight body armor, which can provide protection to all the parts of body against all kinds of shrapnel and bullets, is required. The best suited material for its application is Kevlar based bullet proof vest and wearable. However situation requires lesser number of Kevlar layers to make the protective layer which will be extremely light and provide flexibility of motion. To achieve this, a non-Newtonian fluid known as Shear Thickening Fluid (STF) is developed, optimum value is obtained for Kevlar-STF combination and the layers of Kevlar are impregnated with STF. Samples of 4, 6 and 8 layers of Kevlar fabrics are bonded together at the edges by epoxy resin and are subjected to impact loading for different speeds. Experiments are conducted till the ballistic limits of the samples and the ballistic limit values are obtained. The energy absorbed, residual velocities and the ballistic limits of the sample are calculated and compared with theoretically calculated values. Experiments are carried for fabrics with and without STF. It is found that there is a substantial increase in the energy absorption of Kevlar with the addition of STF and the study reveals that the STF based impact resistant structures can be better structural armor material with less number of layers and less weight.
机译：在现代战争中，需要灵活而轻便的防弹衣，该防弹衣可以保护身体的各个部位免受各种弹片和子弹的伤害。最适合其应用的材料是基于凯夫拉纤维的防弹背心和可穿戴。然而，情况需要较少数量的凯夫拉尔层来制造保护层，该保护层将非常轻并提供运动的灵活性。为此，开发了一种称为剪切增稠液（STF）的非牛顿流体，为凯夫拉尔-STF组合获得了最佳值，并且凯夫拉尔的各层都被STF浸渍。 4层，6层和8层Kevlar织物的样品在边缘处通过环氧树脂粘合在一起，并以不同的速度承受冲击载荷。进行实验直到获得样品的弹道极限和弹道极限值。计算出样品的吸收能量，残余速度和弹道极限，并将其与理论计算值进行比较。对带有和不带有STF的织物进行了实验。已发现，添加STF后，凯夫拉尔的能量吸收显着增加，并且研究表明，基于STF的耐冲击结构可以是更好的结构装甲材料，层数更少，重量更轻。

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