摘要
多孔泡沫铝钛合金板不仅克服了传统防护结构质量大、运输不便等缺点,还具有耐疲劳、比强度高等优点,对抗爆防护材料轻质化、高效化具有十分重要的意义。采用有限元仿真分析软件LS-DYNA,对夹芯复合材料板在冲击波与破片联合作用下的失效模式和防护性能展开了数值模拟,对比分析了不同排列方式下泡沫铝夹芯结构对背板变形程度的影响。结果表明:在40 cm爆距下,破片会先于冲击波对靶板进行作用,且破片载荷强度远大于冲击波载荷强度;当厚度方向的结构按照“1 mm厚钛合金面板+10 mm厚泡沫铝+10 mm厚泡沫铝+10 mm厚纤维+1 mm厚钛合金背板”排列时,背板变形位移最小,结构总内能最高,分别为13.9 mm和52.7 kJ,此工况可以更有效地降低结构整体变形程度,吸收面板变形所产生的能量。
The porous foam aluminum alloy plate not only overcomes the shortcomings of the traditional protective structure such as heavy weight and inconvenient transportation,but also has the advantages of fatigue resistance and high specific strength.The lightweight and efficient anti-explosion protection materials are of great significance.The finite element analysis software LS-DYNA is used to numerically simulate the failure mode and protection performance of the sandwich composite plate under the combined action of shock wave and fragment,and analyze the effect of the foam aluminum sandwich structure on the deformation of the backboard under different arrangements.The results show that,at a detonation distance of 40 cm,the fragments will act on the target plate before the shock wave,and the fragment load strength is far greater than the shock wave load strength.When the arrangement of foam aluminum and fiber is“1 mm-thick aluminum alloy panel+10 mm-thick foam aluminum+10 mm-thick foam aluminum+10 mm-thick fiber+1 mm-thick aluminum alloy backplane”,the deformation displacement of the backboard is the smallest,and the total internal energy of the structure is the highest,which are 13.9 mm and 52.7 kJ,respectively.The overall deformation degree of the structure can be more effectively reduced and the energy generated by the panel deformation is absorbed under the working condition.
作者
王孟鑫
陈睿颖
王金相
WANG Mengxin;CHEN Ruiying;WANG Jinxiang(National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;School of Automation, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2021年第5期1041-1052,共12页
Acta Armamentarii
基金
国家自然科学基金项目(11672138)。
关键词
夹芯复合结构
破片与冲击波耦合
防护性能
毁伤机理
数值模拟
sandwich composite structure
fragment shock wave coupling
protection performance
damage mechanism
numerical simulation
