Abstract：To study fragmentation effect of a cylindrical projectile with a hypervelocity impacting a thin plate structure is of great significance for space debris protection and kinetic energy weapons damage effect.Here,the debris cloud forming process and expanding were studied with the SPH method of ANSYS/AUTODYN code.It was shown that the numerical simulation results for the first and the secondary debris cloud morphologies are in good agreement with the test results,and the correctness of the calculation method and the model parameters was verified.Furthermore,the fragmentation laws of cylidrical projectiles made by 3 materials of tungsten alloys,RHA and LY12 aluminum with a hypervelocity impacting a thin plate structure were studied with the numerical simulation method.The empirical equations relating the fragment length of projectiles to target material properties,target size and inital impacting velocity are obtained with the dimensional analysis method.
汪庆桃，吴克刚，陈志阳. 圆柱形长杆超高速正碰撞薄板结构破碎效应[J]. 振动与冲击, 2017, 36(5): 54-60.
WANG Qingtao,WU Kegang,CHEN Zhiyang. Fragmentation effect of a long cylindrical rod with a hypervelocity normaly impacting a thin plate structure. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(5): 54-60.
[1] F.L. Whipple, Meteorites and Space Travel[J]. Astronomical Journal, No. 1161, pp. 131 (1947).
[2] C.J.Maiden，and A.R.McMillan， An investigation of the protection afforded a spacecraft by a thin shield， AIAA Journal， pp. 1992- 1998， 1964
[3] Piekutowski AJ.Characteristics of debris clouds produced by hypervelocity impact of aluminum spheres with thin aluminum plates. Int J Impact Eng 1993;14:573–86.
[4] Piekutowski AJ, Fragmentation-Initiation Threshold for Spheres Impacting at Hypervelocity[J]. int. J. engng, Vol.29(2003),pp:563-574.
[5] Piekutowski AJ. Debris clouds produced by the hypervelocity impact of nonspherical projectiles. Int J Impact Eng 2001;26:613–24.
[6] L.B.Lucy, A numerical approach to the testing of the fission hypothesis[J], Astron. J., 82, 1013(1977)
[7] 汪庆桃，张庆明，吴克刚等. 超高速碰撞形成一次碎片云特性研究[J]. 国防科技大学学报, 2013, 35(5):124-128.
WANG Qing-tao, ZHANG Qing-ming, WU ke-gang, et al. Description of the First Debris Clouds Formed by Hypervelocity Impact[J]. Journal of National University of Defence Technology, 2013, 35(5):124-128.(in Chinese)
[8] 汪庆桃，张庆明. 多层板结构超高速碰撞效应的数值模拟[J]. 兵工学报,33:227-230,2012.
WANG Qing-tao，ZHANG Qing-ming. Simulation for Damage Effect about Multi-plate Structure Impact by Hypervelocity Projectil[J]. ACTA ARMAMENTARⅡ, 2012,33:227-230.(in Chinese)
[9] ANSYS AUTODYN 14.0. Theory manual, ANSYS Inc. Pittsburgh.
[10] 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 17th International Symposium on Ballistics. Holland, [s.n.], 1983. 541-547.
[11] S. Hiermaier, D. Konke, A.J. Stilp and K. Thoma. Computational simulation of the hypervelocity impact of Al- spheres on thin plates of different materials[J]. Int. J. Impact Engng. 20, 363-374,1997
[12] 汪庆桃. 多层等效结构的超高速碰撞效应[D]. 北京: 北京理工大学: 2010.
WANG Qing-tao. Effect about Multi-layer Equivalent Structures Impact by Hypervelocity Projectile[D]. Beijing institute of technology, Beijing: 201001.(in Chinese)
[13] Piekutowski AJ.Characteristics of debris clouds produced by hypervelocity impact of aluminum spheres with thin aluminum plates. Int J Impact Eng 1993;14:573–86.
[14] S.R. Beissel, C.A. Gerlach, G.R. Johnson. Hypervelocity impact computations with finite elements and meshfree particles[J]. int. J. impact engng, Vol.33(2006), pp.80-90.
[15] D. Depczuk, W.P. Schonberg, Characterizing debris clouds created in oblique orbital debris particle impact[J], Journal of aerospace engineering, 16:4, 177-190, 2003
