Geometrical effects on performances of ceramic/metal armors impacted by projectiles
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摘要: 利用Autodyn软件开展数值模拟工作，对陶瓷/金属复合装甲的防护性能与弹靶尺寸的关系进行研究。首先，建立二维轴对称SPH-Lagrange模型，并利用实验数据验证模型有效性；在此基础上对不同几何参数的弹靶撞击进行数值模拟，分析靶板厚度、靶板平面尺寸、子弹长度等对氧化铝陶瓷/铝合金复合装甲弹道极限速度的影响规律。然后，通过量纲分析，提出装甲弹道极限速度与弹靶几何参数的量纲一关系式，并在数值模拟结果的基础上建立一个装甲弹道极限速度的经验公式。Abstract: The AUTODYN code was applied to investigate the performance changes of the ceramic/metal armors under ballistic impact with the different geometrical parameters.A two-dimensional axisymmetric SPH-Lagrange model was developed, and it was validated by the experimental results.By using the SPH-Lagrange model, numerical simulations were carried out for the impact of the alumina ceramic/aluminum armors by the cylindrical tungsten projectiles in the cases of the different geometrical parameters.Based on the simulation results, the armor ballistic limit velocities of the armors were discussed considering the thicknesses and planar sizes of the armor plates as well as the lengths and diameters of the projectiles.Dimensional analysis was performed to achieve a dimensionless formula for describing the armor ballistic limit velocity varied with the geometrical parameters.And the corresponding empirical formula was given on the basis of the numerical data.
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图 2 APDS子弹侵彻氧化铝陶瓷/铝合金复合装甲的过程
Figure 2. The process of APDS impacting alumina/aluminum armor
图 3 复合装甲弹道极限速度随T1/d比值变化关系
Figure 3. Variation of ballistic limit velocity in composite armor with the ratio of T1/d
图 4 复合装甲弹道极限速度随T2/d比值变化关系
Figure 4. Variation of ballistic limit velocity in composite armor with the ratio of T2/d
图 5 单层装甲弹道极限速度随T1/d比值变化关系
Figure 5. Variation of ballistic limit velocity in single plate with the ratio of T1/d
图 6 单层装甲弹道极限速度随T2/d比值变化关系
Figure 6. Variation of ballistic limit velocity in single plate with the ratio of T2/d
图 7 复合装甲弹道极限速度随L/d比值变化关系
Figure 7. Variation of ballistic limit velocity in composite armor with the ratio of L/d
图 8 复合装甲弹道极限速度随D1/d比值变化关系
Figure 8. Variation of ballistic limit velocity in composite armor with the ratio of D1/d
图 9 弹体撞击过程中陶瓷破碎锥的最大直径
Figure 9. Ceramic maximum fracture cone diameter in process of impacting
图 10 具有不同D1/d值的装甲被撞击时的形态比较
Figure 10. Impacting mode comparison for two armors with different D1/d
图 11 复合装甲弹道极限速度随D2/d比值变化关系
Figure 11. Variation of ballistic limit velocity in composite armor with the ratio of D2/d
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[1] 张伟, 胡德安, 韩旭, 等.陶瓷/金属复合装甲冲击响应的三维SPH法分析[J].爆炸与冲击, 2011, 31(4): 373-379.Zhang Wei, Hu De-an, Han Xu, et al. Three-dimensional SPH analysis of impact responses of ceramic/metal composite armors[J]. Explosion and Shock Waves, 2011, 31(4): 373-379. [2] Swegle J W, Hicks D L, Attaway S W. Smoothed particle hydrodynamics stability analysis[J]. Journal of Computational Physics, 1995, 116(1): 123-134. doi: 10.1006/jcph.1995.1010 [3] Gálvez V S, Paradela L S. Analysis of failure of add-on armour for vehicle protection against ballistic impact[J]. Engineering Failure Analysis, 2009, 16(6): 1837-1845. doi: 10.1016/j.engfailanal.2008.09.007 [4] Abrate S. Impact engineering of composite structures[M]. New York: Springer, 2011. [5] Johnson G R, Stryk R A, Beissel S R, et al. An algorithm to automatically convert distorted finite elements into meshless particles during dynamic deformation[J]. International Journal of Impact Engineering, 2002, 27(10): 997-1013. doi: 10.1016/S0734-743X(02)00030-1 [6] Johnson G R, Cook W H. A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures[C]//Proceedings of the Seventh International Symposium on Ballistics. Netherlands, 1983: 541-547. [7] Johnson G R, Cook W H. Fracture characteristics of three metals subjected to various strains, strain rates, temperatures and pressures[J]. Engineering Fracture Mechnics, 1985, 21(1): 31-48. doi: 10.1016/0013-7944(85)90052-9 [8] Clausen A H, Borvik T, Hopperstad O S, et al. Flow and fracture characteristics of aluminium alloy AA5083-H116as function of strain rate, temperature and triaxiality[J]. Materials Science and Engineering: A, 2004, 364(1/2): 260-272. [9] Lee J K. Analysis of multi-layered materials under high velocity impact using CTH[D]. Ohio: Air Force Institute of Technology, 2008. [10] Johnson G R, Holmquist T J. An improved computational constitutive model for brittle materials[J]. AIP Conference Proceedings, 1994, 309(1): 981-984. [11] Anderson C E, Johnson G R, Holmquist T J. Ballistic experiments and computations of confined 99.5%AL2O3 ceramic tiles[C]//Proceeding of Fifteenth International Symposium on Ballistics. Jerusalem, Israel, 1995. [12] Lundberg P, Westerling L, Lundberg B. Influence of scale on the penetration of tungsten rods into steel-backed alumina targets[J]. International Journal of Impact Engineering, 1996, 18(4): 403-416. doi: 10.1016/0734-743X(95)00049-G -
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