Experimental and numerical study on the ballistic performance of high strength 7A04-T6 aluminium alloy plate against blunt projectile impact
Yuzhou SI-MA1 Xinke Xiao1 Yaopei Wang2 Wei Zhang3
1. Nanyang Institute of Technology, School of Civil Engineering, Nanyang 473004;
2. Nanyang Institute of Technology, School of Software, Nanyang 473004;
3. Harbin Institute of Technology, School of Astronautics, Harbin 150008
Ballistic test of 6 mm thick 7A04-T6 aluminum alloy plate against 5.98 mm diameter rigid blunt projectile impact was conducted in a one-stage gas gun in the impact velocity of 73.9-446.5 m/s in order to learn the ballistic performance of high strength aluminum alloy against kinetic energy projectile impact. The projectile’s residual velocity after perforation and the fracture behavior of the target were recorded. By fitting the projectile’s initial versus residual velocity data, we obtain the ballistic limit velocity of the target. Meanwhile, numerical ballistic test was conducted by using 3D finite element model built in ABAQUS/Explicit, where the mechanical behavior of 7A04-T6 aluminum alloy was characterized by Johnson-Cook strength model and a modified Johnson-Cook fracture criterion. It was found experimentally that the high strength 7A04-T6 aluminum alloy plate under blunt projectile impact fails by shear plugging and obvious cracks can be observed in the surface of the plug. The ballistic limit is 156 m/s and the initial impact velocity enable shear plugging is about 90% of the ballistic limit. According to the numerical simulation, the finite element calculation can reproduce the shear plugging and the fracture pattern in the plugs. The ballistic limit is 168.8 m/s, i.e., 9% higher than that obtained in the test. It was also found that shear plugging comes into being when initial velocity is above about 92% of the ballistic limit, which is in close agreement with the experiment result.
司马玉洲1，肖新科1，王要沛2，张伟3. 7A04-T6高强铝合金板对平头杆弹抗侵彻行为的试验与数值模拟研究[J]. 振动与冲击, 2017, 36(11): 1-7.
Yuzhou SI-MA1 Xinke Xiao1 Yaopei Wang2 Wei Zhang3. Experimental and numerical study on the ballistic performance of high strength 7A04-T6 aluminium alloy plate against blunt projectile impact. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(11): 1-7.
[1] S Dey. High-strength steel plates subjected to projectile impact-An experimental and numerical study[D]. Trondheim: Norwegian University of Science and Technology, 2004.
[2] 肖新科. 双层金属靶的抗侵彻性能和Taylor杆的变形与断裂[D]. 哈尔滨：哈尔滨工业大学，2010年.
XIAO Xinke. The ballistic resistance of double-layered metallic target and the deformation & fracture of taylor rod[D]. Harbin: Harbin Institute of Technology, 2010.
[3] T Børvik, S Dey, AH Clausen. Perforation Resistance of Five Different High-Strength Steel Plates Subjected to Small-Arms Projectiles[J]. International Journal of Impact Engineering, 2009, 36:948-964.
[4] N Kılıç, B Ekici. Ballistic resistance of high hardness armor steels against 7.62 mm armor piercing ammunition[J]. Materials & Design, 2013, 44:35-48.
[5] MA Iqbal, K Senthil, P Sharma, NK Gupta. An investigation of the constitutive behavior of Armox 500T steel and armor piercing incendiary projectile material[J]. International Journal of Impact Engineering, 2016, 96:146-164.
[6] S Ryan, H Li, M Edgerton, D Gallardy, SJ Cimpoeru. The ballistic performance of an ultra-high hardness armour steel: An experimental investigation[J]. International Journal of Impact Engineering, 2016, 94:60-73.
[7] MJ Forrestal, VK Luk, Z Rosenberg, NS Brar. Penetration of 7075-T651 aluminum targets with ogival-nose rods[J]. International Journal of Solids and Structures, 1992, 29(14-15):1729-1736.
[8] F Grytten, T Børvik, OS Hopperstad, M Langseth. Low velocity perforation of AA5083-H116 aluminium plates[J]. International Journal of Impact Engineering, 2009, 36(4):597-610.
[9] T Børvik, AH Clausen, OS Hopperstad, M Langseth. Perforation of AA5083-H116 aluminium plates with conical-nose steel projectiles—experimental study[J]. International Journal of Impact Engineering, 2004, 30(4):367-384.
[10] T Børvik, OS Hopperstad, KO Pedersen. Quasi-brittle fracture during structural impact of AA7075-T651 aluminium plates[J]. International Journal of Impact Engineering, 2010, 37(5):537-551.
[11] JK Holmen, J Johnsen, OS Hopperstad, T Børvik. Influence of fragmentation on the capacity of aluminum alloy plates subjected to ballistic impact[J]. European Journal of Mechanics A/Solids, 2016, 55:221-233.
[12] 张伟, 魏刚, 肖新科, 等. 7A04高强铝合金抗杆弹正撞击性能实验研究[J]. 高压物理学报, 2011, 25(5):401-406.
ZHANG Wei, WEI Gang, XIAO Xinke. Experimental Study on Ballistic Resistance Property of 7A04 Aluminum Alloy Against Rod Projectiles Impact [J]. Chinese Journal of High Pressure Physics, 2011, 25(5):401-406.
[13] 何涛,文鹤鸣. 卵形钢弹对铝合金靶板侵彻问题的数值模拟[J]. 高压物理学报, 2006, 20(4):408-414.
HE Tao, WEN Heming. Numerical Simulations of the Penetration of Aluminum Targets by Ogive-Nosed Steel Projectiles[J]. Chinese Journal of High Pressure Physics, 2006, 20(4):408-414.
[14] Recht RF, Ipson TW. Ballistic Perforation Dynamics[J]. Journal of Applied Mechanics-Transactions ASME, 1963, 30:385-391.
[15] T Børvik, OS Hopperstad, T Berstad, et al. A Computational Model of Viscoplasticity and Ductile Damage for Impact and Penetration. European Journal of Mechanics-A/Solids. 2001, 20:685-712.
[16] 张伟，肖新科，魏刚. 7A04铝合金的本构关系和失效模型[J]. 爆炸与冲击, 2011, 31(1):81-87.
ZHANG Wei, XIAO Xinke, WEI Gang. Constitutive relation and fracture model of 7A04 aluminum alloy[J]. Explosion and Shock, 2011, 31(1):81-87.
[17] Johnson GR, Cook WH. A Constitutive Model and Data for Metals Subjected to Large Strains, High Strain Rates and High Temperatures[C]. Proceeding of the Seventh International Symposium on Ballistic. The Netherlands: The Hague, 1983. 541-547.
[18] Johnson GR, Cook WH. Fracture Characteristics of Three Metals Subjected to Various Strains, Strain Rates, Temperatures and Pressures[J]. Engineering Fracture Mechanics, 1985, 21:31-48.
[19] X Xiao, W Zhang, G Wei, Z Mu, Z Guo. Experimental and numerical investigation on the deformation and failure behavior in the Taylor test[J]. Materials & Design, 2011, 32:2663-2674.
