Long rod eroding penetrators exhibit hydrodynamic behaviour upon impact against the target plates. An experimental study was carried out to investigate the factors affecting the penetration of tungsten alloy rods against rolled homogenous armour at ordnance velocities. Experiments were carried out for range of projectile length to diameter ratios to determine the penetration efficiency of the projectile, where the projectile penetration efficiency is the penetration depth per unit projectile length. Analytical Alekseevski–Tate model was implemented to predict the penetration depth across the length to diameter range and the results were compared with the experimental data. The tungsten percentage of the projectile material was also varied to change its mechanical properties and thus observe the effect of the same on the penetration depth. The experimental results showed a linear relationship between the penetration efficiency and the length to diameter ratio across the considered range of length to diameter ratios. The Alekseevski–Tate model predictions were not consistent across as the model does not consider the effect of length to diameter ratio. The projectiles with high impact energy were able to perforate the target plate.

中文翻译：

---

长杆侵蚀弹对轧制均质装甲冲击试验研究

长杆侵蚀穿透器在撞击目标板时表现出流体动力学行为。进行了一项实验研究，以研究影响钨合金棒在军械速度下对轧制均质装甲的穿透的因素。对弹丸长度与直径比的范围进行了实验以确定弹丸的穿透效率，其中弹丸穿透效率是每单位弹丸长度的穿透深度。实施分析 Alekseevski-Tate 模型以预测整个长度到直径范围内的穿透深度，并将结果与​​实验数据进行比较。还改变弹丸材料的钨百分比以改变其机械性能，从而观察其对穿透深度的影响。实验结果表明，在所考虑的长径比范围内，穿透效率与长径比之间存在线性关系。Alekseevski-Tate 模型的预测不一致，因为该模型没有考虑长径比的影响。具有高冲击能量的射弹能够穿透目标板。