Perforation of thin aluminum alloy plates by blunt projectiles: An experimental and numerical investigation

18th APS-SCCM; 24th AIRAPT

Wei, G.^1 ; Zhang, W.^1

Hypervelocity Impact Research Center, Harbin Institute of Technology, Harbin

150001, China^1

关键词: 2D finite element simulation;    7a04 aluminum alloys;    Aluminum alloy target;    Ballistic limit velocity;    Finite element simulations;    Material performance testing;    Numerical investigations;    Structure deformation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/11/112065/pdf
DOI  :  10.1088/1742-6596/500/11/112065

来源: IOP

【 摘 要 】

Reducing the armor weight has become a research focus in terms of armored material. Due to high strength-to-density ratio, aluminum alloy has become a potential light armored material. In this study, both lab-scale ballistic test and finite element simulation were adopted to examine the ballistic resistance of aluminum alloy targets. Blunt high strength steel projectiles with 12.7 mm diameter were launched by light gas gun against 3.3 mm thickness 7A04 aluminum alloy plates at a velocity of 90∼170 m/s. The ballistic limit velocity was obtained. Plugging failure and obvious structure deformation of targets were observed. Corresponding 2D finite element simulations were conducted by ABAQUS/EXPLICIT combined with material performance testing. The validity of numerical simulations was verified by comparing with the experimental results. Detailed analysis of the failure modes and characters of the targets were carried out to reveal the target damage mechanism combined with the numerical simulation.