分层对TC4钛合金板抗平头弹撞击失效特性的影响

Influence of the layering on the impact failure characteristics of a TC4 titanium target against blunt nose projectile impact

使用Abaqus/Explicit有限元分析软件,开展平头弹撞击不同厚度双层TC4钛合金板数值模拟,研究双层TC4钛合金板撞击失效特性与失效模式随厚度变化规律及机理。通过对比撞击试验与仿真结果,验证数值模型和参数的有效性。在此基础上与等厚度单层TC4钛合金板的抗侵彻性能进行对比,结果表明,对于12.68 mm直径的平头弹,在靶板厚度2~16 mm内,双层结构的弹道极限与总厚度近似呈线性关系。由于单层靶板在4~10 mm内随着厚度增加,弹道极限无明显变化,所以等厚接触式双层结构在该厚度范围相比单层靶有明显的优势。在总厚度为8 mm时,双层靶优势最为明显,弹道极限相比单层靶提高了43%左右。

The finite element analysis software Abaqus/explicit was used to simulate the impact of flat nosed projectile on TC4 titanium alloy plates with different thickness.The relationship was studied between impact failure characteristics and thickness change of double-layer targets.The effectiveness of the simulation model was verified by comparing the impact tests and simulation results.On this basis,the penetration resistance of a TC4 double-layer target was compared with the same thickness of a monolithic target.The results show that the ballistic limit of the double-layer structure is approximately linear with the total thickness of the target plate in the range of 2-16 mm for the flat nosed projectile with 12.68 mm diameter.Due to the special phenomenon that the ballistic limit has no obvious change with the increase of the thickness for the monolithic target plate in the range of 4-10 mm,the double-layer target has obvious advantages over the monolithic target in the thickness range.The ballistic limit is 43%higher than that of the monolithic target when the total thickness is 8 mm.