浸轧压力对STF-Kevlar织物高速冲击性能影响研究

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摘要

为研究浸轧压力对剪切增稠液体(STF)增强Kevlar织物高速冲击性能的影响，分别采用50 kPa, 100 kPa, 200 kPa的压力浸轧STF-Kevlar织物，并使用钛合金模拟叶片弹体开展打靶试验。研究结果表明：STF表现出明显的剪切增稠现象，增稠范围为169~1 500 s^-1，增稠比为56.4；Kevlar织物浸渍STF后，二氧化硅(SiO₂)纳米粒子均匀附着在纤维表面；浸轧压力的增加使STF-Kevlar织物的质量增加率降低；STF-Kevlar织物的能量吸收较纯Kevlar织物高29.4%，但其弹道性能指数(BPI)低于纯Kevlar；浸轧后STF-Kevlar织物的能量吸收高于纯Kevlar织物，但低于未浸轧STF-Kevlar织物；100 kPa的浸轧压力下STF-Kevlar织物的单位面密度吸收的能量最高；STF-Kevlar织物能量吸收的变化趋势与织物极限变形高度的变化一致。

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	刘璐璐
	柳旭
	赵振华
	罗刚
	陈伟

关键词 ：剪切增稠液体(STF), Kevlar织物, 流变性能, 高速冲击, 能量吸收

Abstract：

In order to investigate the influences of padding pressure on the high velocity impact resistance of shear thickening fluid (STF) impregnated Kevlar fabrics, 50 kPa, 100 kPa, 200 kPa pressure were employed to compact the compound fabric. Ballistic impact tests were also carried out using titanium alloy simulated blades projectile. The experimental results show that the shear thickening phenomenon appear in the three STF systems, with the thickening period at 169^-1 500 s^-1 and thickening ratio at 56.4. The nano silica particles are uniformly attached to the surface of the fiber, bonding the fibers together. With the increase of padding pressure, the weight add-on decrease. The energy absorption of STF treated Kevlar fabrics is 29.4% higher than that of neat Kevlar, while the ballistic performance index (BPI) is inferior to untreated fabric. The energy absorption of STF-Kevlar fabrics decreases after padding, but still higher than neat fabric. The 100 kPa padding pressure achieves the maximum BPI. The trend of energy absorpted by fabric is consistent with the variation of deformation cone height.

Key words： shear thickening fluid(STF) Kevlar fabric rheological property high-velocity impact energy absorption

收稿日期: 2019-10-15 出版日期: 2021-04-28

引用本文:

刘璐璐，柳旭，赵振华，罗刚，陈伟. 浸轧压力对STF-Kevlar织物高速冲击性能影响研究[J]. 振动与冲击, 2021, 40(8): 1-9.
LIU Lulu，LIU Xu，ZHAO Zhenhua，LUO Gang，CHEN Wei. A study on the influences of padding pressure on the high speed impact performance of STF-Kevlar fabrics. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(8): 1-9.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I8/1

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