A comparison of the ballistic performance of shear thickening fluids based on particle strength and volume fraction
A comparison of the ballistic performance of shear thickening fluids based on particle strength and volume fraction
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DOI：
10.1016/j.ijimpeng.2015.06.004
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发表时间：
2015-11
影响因子：
5.1
通讯作者：
O. Petel;S. Ouellet;J. Loiseau;D. Frost;A. Higgins
中科院分区：
文献类型：
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作者：
O. Petel;S. Ouellet;J. Loiseau;D. Frost;A. Higgins
对固体颗粒（玉米淀粉、碳化硅和二氧化硅）在液体（乙二醇）中的悬浮液的弹道响应进行了实验研究。一些悬浮液具有足够的体积分数以表现出剪切增稠行为，而其他悬浮液是牛顿流体或轻度剪切稀化。还研究了纯（液体）乙二醇的响应。装有悬浮液的胶囊以200至700米/秒的速度受到凿头碎片模拟射弹的撞击。通过直接摄像测量从胶囊中退出时的剩余抛射体速度。使用一些不同的基于能量和动量的渗透模型的结果进行了分析。一个动量为基础的模型，标准化的悬浮液的密度的影响被认为是最好的崩溃的结果到一个单一的曲线的液体和非剪切增稠悬浮液。只有剪切增稠悬浮液与颗粒具有足够的强度（SiO2和SiC）表现出显着的偏差，从流体力学为主的响应，导致显着的速度递减的弹丸归因于悬浮液的剪切强度。这些剪切强度效应随着抛射体速度的增加而减小，这表明在颗粒间接触中的固体材料的强度被冲击产生的应力所克服。
The ballistic response of suspensions of solid particles (cornstarch, silicon carbide, and silicon dioxide) in a liquid (ethylene glycol) is experimentally investigated. Some of the suspensions are at sufficient volume fraction to exhibit shear-thickening behaviour, while the others are Newtonian or mildly shear-thinning. The response of neat (liquid) ethylene glycol is also studied. Capsules containing the suspensions are impacted with a chisel-nosed fragment-simulating projectiles at velocities between 200 and 700 m/s. The residual projectile velocity upon exit from the capsule is measured via direct videography. The results are analysed using a number of different energy-based and momentum-based penetration models. A momentum-based model that normalizes the effect of the density of the suspension is seen to perform the best in terms of collapsing the results onto a single curve for the liquid and non-shear thickening suspensions. Only shear thickening suspensions with particles having sufficient strength (SiO2and SiC) show significant deviation from hydrodynamic-dominated response, resulting in significant velocity decrements in the projectile attributable to the shear strength of the suspensions. These shear strength effects diminish as the projectile velocity increases, suggesting that the strength of the solid material in the interparticle contacts is overcome by the impact-generated stresses.