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首页> 外文期刊>International journal of impact engineering >Experimental investigation on the cellular steel-tube-confined concrete targets against projectile impact
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Experimental investigation on the cellular steel-tube-confined concrete targets against projectile impact

机译：对射弹冲击的细胞钢管混凝土靶标的实验研究

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摘要

Steel-tube-confined concrete (STCC) targets show better anti-penetration performance than semi-infinite concrete targets as the steel tube imposes constraint on the in-filled concrete to enhance its strength and toughness. Cellular structural system for in-plane and multi-layer overlay extension is an effective way to promote the application of STCC targets to practical protective structures. In this paper, penetration tests of cellular STCC targets (single-layer and double-layer 7-cell hexagonal STCC targets) impacted by 12.7 mm Armor Piercing Projectile (APP) were conducted, and side length and thickness of steel tube, steel ratio, impact point and velocity, and repeated impacts were considered. Moreover, single-cell STCC targets and semi-infinite concrete targets were also designed and tested for comparison with the cellular STCC targets. The typical damage modes and parameters of the tested cellular STCC targets including the range, depth and volume of funneled crater and depth of penetration (DOP), were obtained and discussed. It is shown that the 7-cell hexagonal STCC targets show improved anti-penetration performance in comparison to the single-cell STCC targets under the same conditions; the anti-penetration performance of the double-layer 7-cell hexagonal STCC targets was weakened due to the free surfaces between the layers; the side length and thickness of steel tube, steel ratio and impact velocity have significant influence on the DOP of the 7-cell hexagonal STCC targets; optimizing the side length and thickness of steel tube could greatly improve the anti-penetration performance of the cellular STCC protective structures. Moreover, the 7-cell hexagonal STCC targets also show excellent anti-penetration performance under the repeated impacts of 12.7 mm APP.
机译：钢管限制混凝土（STCC）靶标显示出比半无限混凝土目标更好的防渗透性能，因为钢管对充满混凝土的限制施加限制，以提高其强度和韧性。平面内和多层覆盖扩展的蜂窝结构系统是促进STCC目标对实际保护结构的有效方法。本文采用12.7mm Armor刺穿射弹（APP）的细胞STCC靶（单层和双层7细胞六边形STCL靶标的渗透试验，侧长度和钢管厚度，钢比考虑了冲击点和速度，并反复影响。此外，还设计并测试了单细胞STCC靶和半无限混凝土靶标以与细胞STC靶进行比较。获得了典型的损伤模式和测试的细胞STCC靶的参数，包括漏斗的火山口的范围，深度和体积和渗透渗透（DOP），并讨论。结果表明，与在相同条件下的单细胞STC靶相比，7细胞六边形STCC靶显示出改善的抗渗透性能;由于层之间的自由表面，双层7细胞六边形STCC靶的抗渗透性能被削弱;钢管，钢比率和冲击速度的侧长度和厚度对7细胞六方STCS靶的DOP产生了显着影响;优化钢管的侧长度和厚度可以大大提高细胞STCC保护结构的防渗透性能。此外，7细胞六边形STCC靶也在12.7mm App的反复影响下显示出优异的抗渗透性能。

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