电炮加载下芳纶蜂窝夹芯板的动力响应  

Dynamic responses of aramid honeycomb sandwich panels loaded by an electric gun

作　　者：赵亚运 莫建军[2] 谭福利[2] 孙宇新[1] 张进 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094 [2]中国工程物理研究院流体物理研究所,四川绵阳621999 [3]南京晓庄学院环境科学学院,江苏南京210094

出　　处：《爆炸与冲击》2018年第1期85-91,共7页Explosion and Shock Waves

摘　　要：研究了方形钛-芳纶蜂窝夹芯板在电炮驱动的高速聚酯飞片撞击加载下的动力响应,给出了面板和蜂窝芯层在不同冲击速度下的变形及失效模式。采用VISAR(velocity interferometer system for any reflector)测速技术测量了后面板中心点的速度时程,分析了芳纶蜂窝夹芯板的动态响应过程,讨论了冲击速度对夹芯板动力响应和抗冲击能力的影响。研究结果表明,低波阻抗的芳纶蜂窝破碎行为阻断了应力波向后面板的传播途径,破碎的蜂窝和塑形大变形的前面板吸收了高速冲击的大部分能量,充分发挥了钛合金的高强度和芳纶蜂窝的缓冲吸能特性,提高了夹芯板整体的防护能力。We studied the dynamically loaded quadrate sandwich plates constructed from titanium alloy plates with an aramid honeycomb core using high-velocity Mylar flyers produced by an electric gun,and classified systematically the deformation/failure modes of the plates and the honey comb core. Applying the velocity interferometer system for any reflector( VISAR) in measuring the velocity history at the midpoint of the back plates,we analyzed the dynamic response processes of the sandwich panels and identified the influences of the impact velocity on the dynamic response and the impact resistance of the sandwich panels. The results indicate that the stress pulses were blocked by the aramid honeycombs( a low wave impedance material),which led to the deformed front plates that absorbed most of the impact energy,thereby improving effectively the impact resistance capability of the general sandwich panels owing to the high strength of the titanium alloy and the energy absorption of the aramid honeycomb.

关 键 词：动力响应 脉冲载荷 夹芯板 芳纶蜂窝 聚酯飞片 电炮 

分 类 号：O347.3[理学—固体力学]