关键词: 爆炸力学, 芳纶复合材料, 钨合金球, 钢球, 抗弹机理

Abstract: The anti-perforation performance of aramid composite made by aramid fiber reinforced polyurethane against 2.05 g tungsten ball, 1.03 g steel ball and 4.50 g steel ball was studied in this paper. And the difference of anti-perforation performance of it against three different kinds of representative balls above was also discussed. The results show that the anti-perforation performance of aramid composite varies with the bullets. The anti-perforation performance was lower for 2.05 g tungsten balls, and higher for 1.03 g steel balls, while in the middle for 4.50 g steel balls. Moreover, a new method which is called specific energy absorption per direct effect area (PSEA) was put forward for expressing the anti-perforation performance of aramid composites against different kinds of the spheric projectiles. The experiment result shows that PSEAs are almost the same when the aramid composite is impacted by the same kind of spheric projectiles. The PSEA was lower for tungsten balls than for steel spheres, which may be used in calculating the ballistic limit velocity of aramid composite against the other spheric projectiles. And the validation result shows that the ballistic limit velocity calculated by PSEA differs with the test results about 1% to 6%.

Key words: explosion mechanics, aramid composite, tungsten ball, steel ball, anti-projectile mechanism, specific energy absorption per direct effect area