金属射流毁伤铝合金与钢靶板对比分析

Comparative Analysis of Metal Jet Damaging Steel and Aluminum Alloy Target

研究薄钢板和薄铝合金靶板已被广泛用于轻型装甲防护上。为了更深入的研究破甲弹对轻型装甲的毁伤机理,以及两种金属靶板的抗毁伤能力,采用三维非线性动力有限元程序LS-DYNA3D对金属射流侵彻钢靶板与铝合金靶板进行了数值仿真。描述了破甲弹侵彻铝合金靶板与钢靶板的物理过程,对比分析了铝合金靶板与钢靶板的毁伤情况,以及金属射流头部速度、体积随时间变化的规律,得出了金属射流侵彻两种不同金属材料靶板的扩孔规律与毁伤效果。分析结果表明金属射流毁伤相同厚度的钢靶板与铝合金靶板时,对于钢靶板,射流侵彻后,后效侵彻威力相对更小但后效毁伤作用范围更大,而对于铝合金靶板,由于延展性更好,从而减少了射流后效作用范围,但其射流能量相对更大。上述结果对进一步研究破甲弹轻对型装甲的毁伤机理,以及轻型装甲的防护设计都具有重要的参考价值。

Thin steel and aluminum alloy target are applied in most of the light armor. In order to study the dam- age mechanism of the thin steel and aluminum alloy target, a series of numerical simulations of HEAT damage targets were done by the finite element code LS-DYNA 3D. The physical phenomena of HEAT damaging thin steel and alu- minum alloy target were described detailly. Besides, we analysed the damaged situation of the thin steel and alumi- num alloy target, variation of the volume and velocity of the metal jet comparatively. The results show that the damage mechanisms of the two different targets are different. The energy of the metal jet is greater while the radius of the damage is smaller after it penetration the aluminum alloy target. The situation of the steel alloy target is opposite. It is helpful to study the damage mechanism of the light armored caused by the HEAT further.