玄武岩/Kevlar纤维布填充防护结构撞击极限及损伤特性

Ballistic limit and damage properties of basalt / Kevlar stuffed shield

为了研究玄武岩/Kevlar纤维布填充防护结构的撞击极限和损伤特性,采用非火药驱动二级轻气炮进行超高速撞击实验,拟合撞击极限曲线,并与Nextel/Kevlar填充防护结构及三层铝防护结构进行比较。结果表明:玄武岩/Kevlar填充防护结构具有和Nextel/Kevlar填充防护结构类似的防护效果,防护性能优于三层铝防护结构。进一步研究填充防护结构铝合金防护屏、纤维布填充层及铝合金舱壁的损伤形式,分析了造成防护屏、填充层与舱壁不同损伤形貌的原因,探索了玄武岩/Kevlar纤维布填充防护结构的防护机理,得出玄武岩纤维布填充层使弹丸碎化,而Kevlar填充层消耗、吸收和分散弹丸或碎片云的能量。

In order to study the ballistic limits and damage properties of the basalt / Kevlar stuffed shields,hypervelocity impact tests were carried out by non-power two-stage light-gas gun facilities. The ballistic limit curves were fitted with the test data,and compared with those of the Nextel / Kevlar stuffed shields and the allaluminum triple-wall shields with the same areal density. The results indicate that the protection property of the basalt / Kevlar stuffed shields is the same as that of the Nextel / Kevlar stuffed shields,and better than that of the all-aluminum triple-wall shields. Further,the hypervelocity impact damage properties of the first bumper,the stuffed layer,and the rear wall were investigated. The reasons were analyzed which caused the damage types of the bumpers different,and the protection mechanisms of the basalt / Kevlar stuffed shields were explored. The results show that the basalt fabrics broke the aluminum projectiles into pieces,and the Kevlar fabrics absorbed and dissipated the energy of the aluminum projectiles or debris clouds.