Energy analysis of fabric impregnated by shear thickening fluid in yarn pullout test
Energy analysis of fabric impregnated by shear thickening fluid in yarn pullout test
复制标题
纱线拉拔试验中剪切增稠液浸渍织物的能量分析
DOI：
10.1016/j.compositesb.2019.106901
复制
发表时间：
2019-10-01
影响因子：
13.1
通讯作者：
Liu, Chen
中科院分区：
文献类型：
--
作者：
Bai, Ruixiang;Ma, Yu;Liu, Chen
用剪切增稠液（STF）浸渍织物形成双相复合材料是提高柔性织物防弹性能的一种有潜力的方法。本研究以二氧化硅（SiO2）为分散相，乙二醇为分散剂，采用行星球磨法制备质量分数分别为62%、65%和70%的STF。对凯夫拉49平纹机织物进行浸渍，形成双相复合材料。在加载速度分别为100mm /min、500mm /min和1000mm /min的情况下，对纯织物和STF浸渍织物进行了拔纱试验。实验结果表明，STF浸渍织物的纱线拉拔载荷高于纯织物，且与纱线拉拔速度呈相关性。提出了一种新的能量吸收模型，分析了纱线拉拔试验中的能量吸收机理。得出的结论是，在纱线拉拔试验中，外力所做的功可以等效于纱线间摩擦的能量耗散。STF浸渍织物的摩擦能耗散比纯织物明显增加。
Impregnating fabrics with shear thickening fluid (STF) to form bi-phase composite is a potential method to improve the bulletproof resistance of flexible fabrics. In this study, a planetary ball milling method was used to prepare STF with 62, 65 and 70 wt% mass fraction using silica (SiO2) as dispersing phase and ethylene glycol as dispersant. The Kevlar 49 plain woven fabric was impregnated to form bi-phase composite. The yarn pull-out tests of neat fabrics and STF impregnated fabrics with loading speeds of 100, 500 and 1000 mm/min were carried out respectively. The experimental results show that STF impregnated fabrics have higher yarn pull-out loads than neat fabrics, and show a correlation of yarn pullout speed. A new energy absorption model is proposed to analyze the energy absorption mechanism in yarn pullout test. It is concluded that the work done by external force in yarn pull-out test can be equivalent to the energy dissipation of friction between yarns. The friction energy dissipation of STF impregnated fabrics is obviously increased compared with that of neat fabrics.