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作为“液体防弹衣”的剪切增稠流体的实验研究：用于防弹保护的非常规配方

Experimental Investigations on Shear Thickening Fluids as "Liquid Body Armors": Non-Conventional Formulations for Ballistic Protection.

作者信息

Alexe Florentina, Sau Ciprian, Iorga Ovidiu, Toader Gabriela, Diacon Aurel, Rusen Edina, Lazaroaie Claudiu, Ginghina Raluca Elena, Tiganescu Tudor Viorel, Teodorescu Mircea, Sobetkii Arcadie

机构信息

Research and Innovation Center for CBRN Defense and Ecology, 225 Olteniţei Ave., 041327 Bucharest, Romania.

Military Technical Academy "Ferdinand I", 39-49 George Cosbuc Boulevard, 050141 Bucharest, Romania.

出版信息

Polymers (Basel). 2024 Aug 15;16(16):2305. doi: 10.3390/polym16162305.

DOI:10.3390/polym16162305
PMID:39204525
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11359824/
Abstract

Shear thickening fluids (STFs) have garnered attention as potential enhancers of protective capabilities and for the optimization of Kevlar armor design. To assess the possible shear thickening properties and potential application in ballistic protection, ten formulations were developed by employing polyethylene glycol (PEG) or polypropylene glycol (PPG), along with fumed silica or Aerosil HDK. Rheological characterization facilitated the identification of formulations displaying shear thickening behavior. The potential integration of the selected shear thickening fluids (STFs) into Kevlar-based composites was investigated by studying the impact resistance of Kevlar soft armor structures. Also, high-velocity impact testing revealed that the distance between aramid layers plays a crucial role in the impact resistance effectiveness of Kevlar-STF composite structures and that there is a very narrow domain between optimal and undesired scenarios in which STF could facilitate the penetration of Kevlar. The introduction of STF between the Kevlar sheets disrupted this packing and the energy absorption capacity of the material was not improved. Only one formulation (PEG400, Aerosil 27 wt.%) led to a less profound traumatic imprint and stopped the bullet when it was placed between layers no.1 and no.2 from a total of 11 layers of Kevlar XP. These experimental findings align with the modeling and simulation of Kevlar-STF composites using Ansys simulation software (Ansys® AutoDyn 2022 R2).

摘要

剪切增稠流体（STF）作为防护能力的潜在增强剂以及用于优化凯夫拉纤维装甲设计而受到关注。为了评估其可能的剪切增稠特性以及在弹道防护中的潜在应用，通过使用聚乙二醇（PEG）或聚丙二醇（PPG）以及气相二氧化硅或埃肯HDK开发了十种配方。流变学表征有助于识别表现出剪切增稠行为的配方。通过研究凯夫拉纤维软装甲结构的抗冲击性，研究了将选定的剪切增稠流体（STF）集成到基于凯夫拉纤维的复合材料中的可能性。此外，高速冲击测试表明，芳纶层之间的距离在凯夫拉-STF复合结构的抗冲击有效性中起着关键作用，并且在最佳和不理想情况之间存在一个非常狭窄的范围，在该范围内STF可能会促进子弹穿透凯夫拉纤维。在凯夫拉纤维片材之间引入STF破坏了这种堆积，并且材料的能量吸收能力没有得到改善。只有一种配方（PEG400，27重量%的气相二氧化硅）在放置于总共11层凯夫拉XP的第1层和第2层之间时，导致创伤印记不那么严重并阻止了子弹。这些实验结果与使用Ansys模拟软件（Ansys® AutoDyn 2022 R2）对凯夫拉-STF复合材料进行的建模和模拟结果一致。

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