多层隔热材料对填充式结构高速撞击损伤影响的实验研究  

Experimental Investigation of Multi-layer Insulation Effect on Damage of Stuffed Shield by High-velocity Impact

作　　者：管公顺[1] 曾明[1] 李航杰 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150080

出　　处：《材料工程》2016年第9期96-102,共7页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(11172083)

摘　　要：在填充式结构中加入多层隔热材料(MLI),利用二级轻气炮发射铝球弹丸在真空环境下对其进行高速撞击实验,获得了MLI位于不同位置时的防护结构损伤模式,研究MLI对填充式结构高速撞击损伤与防护特性的影响。结果表明:当MLI位于首层薄铝板前侧时,薄铝板穿孔尺寸增大,首层薄铝板耗散弹丸撞击动能的能力增强,有助于填充式结构高速撞击防护性能提高;当MLI位于首层薄铝板后侧时,弹丸击穿薄铝板后次生碎片云团的膨胀扩散受到抑制,不利于填充式结构高速撞击防护性能提高;在相同撞击条件下,当MLI位于填充层前侧时,填充层中心穿孔尺寸增大,当MLI位于舱壁前侧时,舱壁弹坑分布范围减小。The stuffed shield with multi-layer insulation（MLI）was designed by improving on Al Whipple shield,and a series of high-velocity impact tests were practiced with a two-stage light gas gun facility at vacuum environment.The damage model of the stuffed shield with different MLI location by Al-sphere projectile impacting was obtained.The effect of MLI on damage of the stuffed shield by high-velocity impact was studied.The results indicate when the MLI is located at front side of the first Al-plate,the protection performance of the stuffed shield is improved with the larger perforation diameter of the first Al-plate and more impact kinetic energy dissipation of the projectile.When MLI is arranged at back side of the first Al-plate,the expansion of the secondary debris cloud from projectile impacting the first Al-plate is restrained,it is not good to improve the protection performance of the stuffed shield.When MLI is arranged at front side of the stuffed wall,the perforation size of the stuffed wall increases;when MLI is arranged at front side of the rear wall,the distribution range of crater on the rear wall decreases.

关 键 词：多层隔热材料 填充式结构 高速撞击 损伤 空间碎片 

分 类 号：V423.41[航空宇航科学与技术—飞行器设计] O347[理学—固体力学]