Research on EOS at Extremely High Pressure Using a Three-stage Gas Gun Hypervelocity Launcher Techniques
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摘要: 根据阻抗梯度飞片设计原则和超高速数值模拟技术设计出一种新的叠层波阻抗梯度飞片,并利用三级炮加载技术将Ta飞片加速至9 km/s以上,测量了Ta在超高压下的状态方程。三级炮实验实现了冲击波速度与粒子速度的同时测量,Ta的Hugoniot数据与文献中发表的数据具有很好的线性关系,说明三级炮加载技术适合于材料超高压状态方程研究。Abstract: A new material system for fabricating graded-density impactors was designed based on the standard design principle of graded wave-impedance materials and numerical simulation method for hypervelocity launching. The secondary Ta flyer-plate was accelerated over 9 km/s by a three-stage gun and used to study equation of state (EOS) of Ta at extremely high pressure. The particle velocity and shock velocity were measured simutaneously in EOS experiments. The obtained Hugoniot data were well consistent with the corresponding experimental data published previously. It shows that the three-stage gas gun hypervelocity launcher technique is suitable to research on EOS at extremely high pressure.
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Key words:
- graded wave impedance flyer-plate /
- three-stage gun /
- EOS
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Zhang F, Wen S G, Sun C W, Experimental Studies on Multiple-stage Flyers [J], Explosion and Shock Waves, 2001, 21(1): 13-16. (in Chinese) 赵峰, 文尚刚, 孙承纬. 多级串联式超高速飞片装置实验研究 [J]. 爆炸与冲击, 2001, 21(1): 13-16. Knudson M D, Lemke R W, Hayes D B. Near-Absolute Hugoniot Measurements in Aluminum to 500 GPa Using a Magnetically Accelerated Flyer Plate Technique [J]. J Appl Phys, 2003, 94(7): 4420-4431. Cottet F, Romain J P, Fabbro R. Ultrahigh-Pressure Laser-Driven Shock-Wave Experiments at 0. 6 s Wavelength [J]. Phys Rev A, 1983, 52(21): 1884-1886. Chhabildas L C, Kmetyk L N, Reinhart W D. Enhanced Hypervelocity Launcher-Capabilities to 16 km/s [J]. Int J Impact Eng, 1995, 17(1-3): 183-194. Winfree N A, Chhabildas L C, Reinhart W D. EQS Data of Ti-6Al-4V to Impact Velocities of 10. 4 km/s on a Three-Stage Gun [A]//Furnish M D, Thadhani N N, Horie Y. Shock Compression of Condensed Matter-2001 [C]. New York: AIP, 2002: 75-78. Wang C B, Sheng Q, Zhang L M. A Flier-Plate Material with Graded Impedance Used in Dynamic High-Pressure Physics [J]. Journal of Wuhan University of Technology-Materials Science Edition, 2002, 17(4): 32-35. Sheng Q, Zhang L M, Wang C B, et al. Design and Optimization of Wave Impedance Distribution for Flyer Materials [J]. Chin Phys Soc, 2003, 52: 1663-1667. (in Chinese) 沈强, 张联盟, 王传彬, 等. 梯度飞片材料的波阻抗分布设计与优化 [J]. 物理学报, 2003, 52: 1663-1667. Sheng Q, Zhang L M, Wang C B, et al. A Study on Generating Quasi-Isentropic Compression via Graded Impedance Flyer [J]. Chin Phys Soc, 2002, 51(8): 1759-1763. (in Chinese) 沈强, 张联盟, 王传彬, 等. 为实现准等熵压缩的波阻抗梯度飞片的实验研究 [J]. 物理学报, 2002, 51(8): 1759-1763. Timothy G T, Chhabildas L C. Computational Design of Hypervelocity Launchers [J]. Int J Impact Eng, 1995, 17: 849-860. Bai J S, Hua J S, Hu J B, et al. Experimental Research and Numerical Analysis for Hypervelocity Lauch [J]. Chinese Journal of Applied Mechanics, 2008, 25(2): 177-181. (in Chinese) 柏劲松, 华劲松, 胡建波, 等. 超高速发射实验及数值分析 [J]. 应用力学学报, 2008, 25(2): 177-181. Bai J S, Tan H, Li P, et al. Numerical Simulation Method for 2-D Hypervelocity Laucher under the Graded Density Impactor Drives [J]. Chinese Journal of Computational Physics, 2004, 21(4): 305-310. (in Chinese) 柏劲松, 谭华, 李平, 等. 阻抗梯度飞片加载下的超高速发射二维数值模拟方法 [J]. 计算物理, 2004, 21(4): 305-310. Mitchell A C, Nellis W J. Shock Compression of Aluminum, Copper and Tantalum [J]. J Appl Phys, 1981, 52(5): 3363-3373. Marsh S P. LASL Shock Hugoniot Data [Z]. London: University of California Press, 1980. Dai C D, Tan H, Hu J B. Hugoniot Evaluation of the Preheated Metal from Its Principal Hugoniot [J]. J Appl Phys, 2006, 99: 56102.
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