Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 100, Issue -, Pages 161-169Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2017.04.015
Keywords
Fabrics/textiles; Nanoparticles; Impact behavior; Mechanical testing; Shear thickening fluid
Funding
- National Natural Science Foundation of China [11372301]
- Fundamental Research Funds for the Central Universities [WK2480000002]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040502]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
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To investigate the anti-impact mechanism, the mechanical property and energy absorption of the SIT impregnated Kevlar (STF/Kevlar) fabric at high strain rate were conducted using a split Hopkinson pressure bar (SHPB) system. The volume fraction of STF, number of fabric specimens, and impact velocity highly affected the dynamic mechanical performance of the STF/Kevlar composite. The energy transfer rate decreased from 0.85 to 0.01 once the number of fabric specimens increased from 2 layers to 8 layers. The strain rate stiffening mechanism of the STF/Kevlar was analyzed. The Kevlar fabrics underwent four sections during the impact process. The STF was mainly worked in the slip and deformation section by enhancing the friction between fabric yarns and preventing the fabric yarns from slipping. Overall, this work demonstrated that the multilayer Kevlar fabrics impregnated with high volume fraction of STF were the optimal choice for soft body armor. (C) 2017 Published by Elsevier Ltd.
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