7075-T651铝合金靶板剪切冲塞的试验和数值模拟研究

PDF(2251 KB)

振动与冲击 ›› 2019, Vol. 38 ›› Issue (3) : 51-58.

论文

肖新科1，陈琳1,2，杜太生1,2

作者信息 +

Tests and numerical simulation for shear plugging of 7075-T651 aluminium alloy targets

XIAO Xinke1, CHEN Lin1,2, DU Taisheng1,2

Author information +

文章历史 +

摘要

为揭示在断裂准则中引入Lode角的必要性，在一级轻气炮上开展了刚性平头弹侵彻7075-T651铝合金靶板试验,获得了靶板的断裂行为和弹道极限；通过圆棒试样拉伸试验和平板试样剪切试验，标定了Johnson-Cook(JC)本构模型和断裂准则参数和一种Lode角相关的断裂准则；运用ABAQUS软件，分别采用Lode角相关和无关断裂准则对试验进行了三维数值模拟,并对Lode角的影响进行了分析。结果表明：在刚性平头弹撞击下，7075-T651铝合金靶板发生剪切冲塞破坏；7075-T651铝合金的断裂与Lode参数相关，剪切带中初始失效材料的应力三轴度低于0且Lode角接近0，用圆棒拉伸试验标定的JC断裂准则高估了断裂应变；采用JC断裂准则预报的断裂行为与试验有较大差别，得到的弹道极限比试验值高大约42%；采用Lode角相关断裂准则得到的弹道极限与试验结果吻合较好。

Abstract

To reveal the necessity to introduce Lode angle into a fracture criterion, tests on a one-stage light gas gun were conducted for rigid flat-headed projectiles penetrating 7075-T651 aluminum alloy targets to obtain the targets’ fracture behavior and ballistic limit.Through round bar tensile tests and flat plate shear ones, Johnson-Cook (JC) constitution model, fracture criterion parameters and a Lode angle-dependent fracture criterion were calibrated.Adopting ABAQUS finite element software, 3-D numerical simulations were done for the tests using Lode angle-dependent fracture criterion and Lode angle-independent one, respectively.The results showed that 7075-T651 aluminum alloy targets penetrated by rigid flat-headed projectiles have shear plugging damages; 7075-T651 aluminum alloy targets’ fracture is correlated to Lode parameters, in shear band, the initial failure material’s stress tri-axiality is below 0 and Lode angle is close to 0, JC fracture criterion calibrated with round bar tensile tests over-estimates the targets’ fracture strain; fracture behavior of the targets predicted with JC fracture criterion is quite different from that in tests, the ballistic limit simulated is 42% higher than the test value; while the ballistic limit simulated using Lode angle-dependent fracture criterion agrees well with the test value.

导出引用

肖新科1，陈琳1,2，杜太生1,2. 7075-T651铝合金靶板剪切冲塞的试验和数值模拟研究[J]. 振动与冲击, 2019, 38(3): 51-58

XIAO Xinke1, CHEN Lin1,2, DU Taisheng1,2. Tests and numerical simulation for shear plugging of 7075-T651 aluminium alloy targets[J]. Journal of Vibration and Shock, 2019, 38(3): 51-58

参考文献

[1] 司马玉洲, 肖新科, 王要沛, 等. 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):1-7,13.
SIMA Yuzhou, XIAO Xinke, WANG Yaopei, et al. Tests and numerical simulation for anti-penetrating behavior of a high strength 7A04-T6 aluminium alloy plate against a blunt projectile's impact[J]. Journal of Vibration and Shock, 2017, 36(11):1-7,13.
[2] BØRVIK T, HOPPERSTAD O S, PEDERSEN K O. Quasi-brittle fracture during structural impact of AA7075-T651 aluminium plates[J]. International Journal of Impact Engineering, 2010, 37(5):537-551.
[3] BØRVIK T, LANGSETH M, HOPPERSTAD O S, et al. Perforation of 12 mm thick steel plates by 20 mm diameter projectiles with flat, hemispherical and conical noses: Part I: Experimental study[J]. International Journal of Impact Engineering, 2002, 27(1):19-35.
[4] IQBAL M A, TIWARI G, GUPTA P K, et al. Ballistic performance and energy absorption characteristics of thin aluminium plates[J]. International Journal of Impact Engineering, 2015, 77:1-15.
[5] RODRIGUEZ-MILLAN M, GARCIA-GONZALEZ D, RUSINEK A, et al. Perforation mechanics of 2024 aluminium protective plates subjected to impact by different nose shapes of projectiles[J]. Thin-Walled Structures, 2018, 123:1-10.
[6] 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.
[7] BØRVIK T, HOPPERSTAD O S, LANGSETH M, et al. Effect of target thickness in blunt projectile penetration of Weldox 460 E steel plates[J]. International Journal of Impact Engineering, 2003, 28(4):413-464.
[8] BØRVIK T, HOPPERSTAD O S, BERSTAD T, et al. Numerical simulation of plugging failure in ballistic penetration[J]. International Journal of Solids and Structures, 2001, 38(34-35): 6241-6264.
[9] 蒋东, 李永池. 平头弹冲塞靶板的绝热剪切数值模拟[J]. 爆炸与冲击. 2011, 31(1):1-5.
JIANG Dong, LI Yongchi. Numerical simulation of adiabatic shear in blunt nose projectile plugging target[J]. Explosion and Shock Waves. 2011, 31(1):1-5.
[10] DEY S, BØRVIK T, HOPPERSTAD O S, et al. The effect of target strength on the perforation of steel plates using three different projectile nose shapes[J]. International Journal of Impact Engineering, 2004, 30(8-9):1005-1038.
[11] KANE A, BØRVIK T, HOPPERSTAD O S, et al. Finite element analysis of plugging failure in steel plates struck by blunt projectiles[J]. Journal of Applied Mechanics, 2009, 76(5): 051302.
[12] DOLINSKI M, RITTEL D. Experiments and modeling of ballistic penetration using an energy failure criterion[J]. Journal of the Mechanics and Physics of Solids, 2015, 83:1-18.
[13] TENG X, WIERZBICKI T. Evaluation of six fracture models in high velocity perforation[J]. Engineering Fracture Mechanics, 2006, 73(12):1653-1678.
[14] SENTHIL K, IQBAL M A, CHANDEL P S, et al. Study of the constitutive behavior of 7075-T651 aluminum alloy[J]. International Journal of Impact Engineering, 2017, 108:171-190.
[15] IQBAL M A, SENTHIL K, BHARGAVA P, et al. The characterization and ballistic evaluation of mild steel[J]. International Journal of Impact Engineering, 2015, 78:98-113.
[16] WIERZBICKI T, BAO Y, LEE Y W, et al. Calibration and evaluation of seven fracture models[J]. International Journal of Mechanical Sciences, 2005, 47(4-5):719-743.
[17] GAO X, ZHANG T, HAYDEN M, et al. Effects of the stress state on plasticity and ductile failure of an aluminum 5083 alloy[J]. International Journal of Plasticity, 2009, 25(12):2366-2382.
[18] MOHR D, MARCADET S J. Micromechanically-motivated phenomenological Hosford–Coulomb model for predicting ductile fracture initiation at low stress triaxialities[J]. International Journal of Solids and Structures, 2015, 67:40-55.
[19] GORJI M B, MOHR D. Micro-tension and micro-shear experiments to characterize stress-state dependent ductile fracture[J]. Acta Materialia, 2017, 131:65-76.
[20] JOHNSON G R, COOK W H. A Constitutive Model and Data for Metals Subjected to Large Strains, High Strain Rates and High Temperatures[C]. In: Proceeding of the Seventh International Symposium on Ballistic, The Netherlands, The Hague, 1983.
[21] JOHNSON G R, COOK W H. Fracture characteristics of three metals subjected to various strains, strain rates, temperatures and pressures[J]. Engineering Fracture Mechanics, 1985, 21(1):31-48.
[22] WEN H, MAHMOUD H. New model for ductile fracture of metal alloys. I: Monotonic loading[J]. Journal of Engineering mechanics, 2015, 142(2):04015088.
[23] BRAR N S, JOSHI V S, HARRIS B W. Constitutive Model Constants for Al7075‐t651 and Al7075‐t6[C]//AIP conference proceedings. AIP, 2009, 1195(1): 945-948.
[24] BRIDGMAN P W. Studies in large plastic flow and fracture[M]. New York: McGraw-Hill, 1952.
[25] XIAO Xinke, MU Zhongcheng, PAN Hao, et al. Effect of the Lode parameter in predicting shear cracking of 2024-T351 aluminum alloy Taylor rods[J]. International Journal of Impact Engineering, 2018, 120:185-201.
[26] RECHT R F, IPSON T W. Ballistic perforation dynamics[J]. Journal of Applied Mechanics, 1963, 30(3):384-390.
[27] CHEN X W, LI Q M. Shear plugging and perforation of ductile circular plates struck by a blunt projectile[J]. International journal of impact engineering, 2003, 28(5):513-536.
[28] CHEN X W, ZHOU X Q, LI X L. On perforation of ductile metallic plates by blunt rigid projectile[J]. European Journal of Mechanics-A/Solids, 2009, 28(2):273-283.