摘要
为研究聚甲基丙烯酰亚胺(Polymethacrylimide, PMI)泡沫对2A12-T4铝合金双层板抗高速冲击性能的影响,利用一级气炮进行半球形弹体撞击接触式双层铝合金叠层板和铝合金/PMI/铝合金无粘合夹层板的高速冲击实验,获取靶板的弹道极限速度和损伤特性。结果表明,在铝合金板厚度相同的情况下,PMI泡沫夹层通过增加靶板的刚度,限制了铝合金板的塑性变形,减少了冲击能量的吸收,降低了2A12-T4铝合金双层板的抗侵彻性能。此外,PMI泡沫夹层对靶板抗侵彻性能的影响随着弹体速度的增加而减小。
In order to study the effect of PMI foam on the impact resistance of the double-layered plates of aluminum alloy 2 A12-T4, the high-velocity impact experiments were performed to the aluminum alloy double-layered plates and aluminum alloy/PMI/aluminum alloy sandwich panel by using hemispherical-nosed projectiles launched by the one-stage gas gun system. The ballistic limit velocity and damage characteristics of the plates were obtained through the experimental results. The results show that the PMI foam core can restrict the plastic deformation of aluminum alloy plate under the same thickness as the aluminum alloy plate, decrease the absorption of impact energy and reduce the impact resistance of the aluminum alloy 2 A12-T4 double-layered plates by increasing the rigidity of the plate. In addition, the effect of the PMI foam core on the impact resistance of the plates decreases as the increase of velocity of the projectile.
作者
张铁纯
曾宪智
冯正兴
邓云飞
ZHANG TieChun;ZENG XianZhi;FENG ZhengXing;DENG YunFei(Aeronautical Engineering Institute,Civil Aviation University of China,Tianjin 300300,China)
出处
《机械强度》
CAS
CSCD
北大核心
2022年第6期1343-1349,共7页
Journal of Mechanical Strength
基金
中国民航大学实验技术创新基金项目(2020CXJJ99)
中央高校基本科研业务费(3122022045)资助。
关键词
PMI泡沫
冲击
弹道极限
损伤特性
夹层板
PMI foam
Impact
Ballistic limit
Damage characteristics
Sandwich panel
