Experimental Study of Impact Resistance of 2A12 Aluminum Alloy Circular Corrugated Sandwich Plates to Blunt-nosed Projectile

doi:10.3969/j.issn.1004-132X.2021.03.014

Abstract

Abstract: In order to study the impact resistance of aluminum alloy circular corrugated sandwich plates to blunt-nosed projectile, the impact tests of aluminum alloy circular corrugated sandwich plates and monolithic homogeneous plates with equal area density were carried out by the one stage gun system. Based on the test data, the protection performance, failure mode and energy absorption of the circular corrugated sandwich plates against the impacts of projectile were analyzed, and sandwich plates were compared with the monolithic plates to obtain the difference and reason of the impact resistance of the two kinds of plates. The results show that the ballistic limit velocity of the circular corrugated sandwich plates is lower than that of monolithic plates. The impact position of the circular corrugated sandwich plates has an effect on its impact resistance, the ballistic limit of the node of the circular corrugated sandwich plates is higher than that of pedestal. The front plate of circular corrugated sandwich plates is mainly damaged by shear punching, while the core is damaged by shear and crushing, and the back plate is mainly damaged by tensile tearing. For the monolithic plates, the shear plug is localized. In addition, the failure mode and energy consumption of the plates are affected by the impact velocity of projectile.

Key words: corrugated sandwich plate, ballistic limit velocity, failure mode, energy absorption, impact

摘要： 为研究铝合金圆波纹夹芯板对平头弹体的抗冲击性能，通过一级气炮系统开展弹体冲击铝合金圆波纹夹芯板以及等面密度单层均质板的试验。基于冲击试验数据，分析圆波纹夹芯板对弹体冲击的防护性能、失效模式和能量吸收情况，并与单层板进行对比，以获得两种靶板抗冲击性能的差异及原因。研究结果表明：弹体冲击圆波纹夹芯板的弹道极限速度低于单层板的弹道极限速度；圆波纹夹芯板的冲击位置对其抗冲击性能存在影响，圆波纹夹芯板节点与基座冲击相比，弹道极限速度有所提高；圆波纹夹芯板的正面板主要发生剪切冲塞破坏，而芯体发生剪切与压溃破坏，背面板主要发生拉伸撕裂破坏；单层板主要发生局部化的剪切冲塞；此外，靶板失效模式与耗能均受弹体冲击速度的影响。

关键词: 波纹夹芯板, 弹道极限速度, 失效模式, 能量吸收, 冲击

CLC Number:

O385

DENG Yunfei;JIA Huiru;LU Mingjian;ZHANG Yinbo. Experimental Study of Impact Resistance of 2A12 Aluminum Alloy Circular Corrugated Sandwich Plates to Blunt-nosed Projectile[J]. China Mechanical Engineering, DOI: 10.3969/j.issn.1004-132X.2021.03.014.

邓云飞;贾惠茹;路明建;张银波. 2A12铝合金圆波纹夹芯板抗平头弹冲击特性的试验研究[J]. 中国机械工程, DOI: 10.3969/j.issn.1004-132X.2021.03.014.

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