填充泡沫铝防护结构的超高速撞击数值模拟

模仿泡沫金属的生产原理建立了泡抹金属微结构几何模型,结合自编的光滑质点流体动力学程序进行了超高速撞击数值模拟,分别对6种形式的填充泡沫铝防护结构进行了仿真计算,比较了其撞击极限性能.结果表明当泡沫铝处于适当的位置时,填充泡沫铝结构的防护性能优于相同面密度的填充实心铝板结构.通过不同防护结构碎片云特性参数的对比分析表明,...

Numerical simulation investigation in hypervelocity impact on Al-foam stuffed shields

Aluminum foam is a new type of material for shield of spacecrafts which bears fine characteristics when subjected to hypervelocity impact of space debris. A microstructure model of geometry for metallic foams was set up based on their manufacturing process and hypervelocity impact numerical simulations were conducted by self-programmed Smooth Particle Hydrodynamics. Six types of Al-foam stuffed shields were calculated and their ballistic limits were compared with each other. The results indicated that shield performance of Al-foam stuffed shield was better than that of solid Al-plate stuffed shield with the same areal density if the Al-foam was stuffed at appropriate position. The analyses of characteristic parameters of debris cloud of different shields indicated that Al-foam had better shield performance on small-size debris. The microstructure of Al-foam could effectively spread the perpendicular momentum of debris cloud and significantly increase the proportion of material liquefaction and gasification in debris cloud through multi-shock.