弹丸对钢筋混凝土及SFRC靶侵彻特性研究

Investigation on Penetration Characteristics of Projectile into Reinforced Concrete and SFRC Targets

利用弹道靶系统,对钢筋混凝土与钢纤维混凝土(2%钢纤维含量)进行了垂直侵彻模型试验研究,得到了弹丸初速、弹坑直径、最大侵彻深度等试验参数。结合试验数据,分析了不同弹丸速度下两种靶体的开坑特性。引入了钢纤维混凝土材料韧度R,利用能反映材料韧度作用的修正ACE公式对侵彻深度进行了计算,计算结果与试验数据相吻合。并通过数值计算方法对侵彻过程中弹丸减速度时程曲线进行了分析。研究表明,钢纤维混凝土与相同基体钢筋混凝土相比具有良好的抗侵彻性能,且随弹丸速度提高作用愈显著。

The model experiments of projectiles vertically penetrating reinforced concrete and steel fiber reinforced concrete （SFRC） targets （2% steel fiber content） were performed on the Φ37mm ballistic gun. The projectile velocity, maximal penetration depth, crater diameter and other experimental parameters were acquired. The crater performance of the projectile penetrating two kinds of target was analyzed by dealing with the experimental data. The penetration depth was calculated with the modified ACE formula by introducing the toughness index R and the calculation results were in good agreement with experimental data. Not only the material toughness but also the material damage and energy dissipation were reflected by the new method. Besides, the deceleration curve was discussed with the numerical simulation results. It＇s proved that SFRC has excellent anti-penetration characteristic under projectile impact.