M855A1步枪弹侵彻钢靶板数值仿真

Numerical Simulation of the Penetration of M855A1 EPR into Steel Targets

M855A1是一种采用新型穿甲弹结构的小口径步枪弹,较M855步枪弹主要优化了硬目标穿甲与软目标杀伤性能。为研究其穿甲性能,采用有限元软件ANSYS/LS-DYNA对不同射程下M855A1步枪弹侵彻结构钢靶板、装甲钢靶板的过程进行数值仿真,分析穿甲过程中弹头与钢靶板的变形和损伤演化,并对射程与极限穿透厚度的关系进行函数拟合,拟合精度高于99%。结果表明,M855A1步枪弹能基本满足现代小口径步枪弹对穿甲性能的需求,其结构在低速、薄靶条件下对弹体动能、质量的利用效率较高。

M855A1 is a small-calibre high-velocity rifle bullet with the structure of the new type of small-and medium-calibre armour-piercing projectile.Compare to its predecessor,M855/SS109,M855A1 has enhanced penetration performance against hard targets and lethality against soft targets.To study the penetration performance of the new 5.56 mm M855A1,numerical simulations of the process of M855A1 penetrating structural steel target and armoured steel target at different ranges were carried out using the finite element software ANSYS/LS-DYNA.The deformation and damage evolution of the round and steel target during penetration were analysed,and the relationship between range and maximum penetration thickness was fitted as a function,with a fitting accuracy higher than 99%.The results showed that the M855A1 round can meet the demand for penetration performance against hard targets of modern high velocity small-calibre rifle bullets,and its structure is more efficient in utilising the kinetic energy of the round under low-velocity and thin-target conditions.