Improvement on Experiment Technique of Measuring Shear Viscosity of Aluminum under Shock Compression
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摘要: 由于在测量高压下金属粘性的实验中不同测量方法得到的粘性系数值存在很大的系统偏差,所以提出和完善实验方法、获得更多可靠的实验数据显得非常必要。通过改进飞片碰撞的实验技术,在101 GPa压力下测量了铝样品中冲击波前沿上正弦形小扰动的振幅衰减和反向振荡现象,借助Miller和Ahrens对非理想初始流场的解析解,求得铝在此压力下的剪切粘性系数约为800 Pas。Abstract: Because there are great systematic deviations in viscosity coefficients at high pressure when measured by different experiment techniques, it is necessary to improve the experiment technique and obtain more reliable experiment data. In this paper, by the method of improvement on flyer-impact technique, the oscillatory damping and reverse-phase oscillation process on sinusoidally small-perturbed shock front of aluminum at 101 GPa is detected. The shear viscosity coefficient is deduced to be about 800 Pas based on Miller and Ahrens' analytic solution for non ideal initial condition.
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Key words:
- viscosity /
- aluminum /
- small-perturbation /
- shock wave
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Miller G H, Ahrens T J. Shock-Wave Viscosity Measurement [J]. Rev Mod Phys, 1991, 63(4): 919-947. Funakoshi K, Kanzaki M, Yasuda A, et al. Viscosity Measurement of Albite Melt under High Pressure Using an in Situ X-Ray Radiography Technique [A]//Manghnani M H, Nellis W J, Nicol M F. Science and Technology of High Pressure: Proceedings of AIRAPT-17 [C]. Hyderabad, 2000: 1023-1026. Dobson D P, Crichton W A, Vocadlo L, et al. In Situ Measurement of Viscosity of Liquids in the Fe-FeS System at High Pressures and Temperatures [J]. American Mineralogist, 2000, 85(11): 1838-1842. Grady D E. Strain-Rate Dependence of the Effective Viscosity under Steady-Wave Shock Compression [J]. Appl Phys Lett, 1981, 38(10): 825-826. Chhabildas L C, Asay J R. Rise-Time Measurements of Shock Transitions in Aluminum, Copper, and Steel [J]. J Appl Phys, 1979, 50(4): 2749-2758. Swegle J W, Grady D E. Shock Viscosity and the Prediction of Shock Wave Rise Times [J]. J Appl Phys, 1985, 58: 692-701. Liu C L. Phenomenological Description of Viscous Coefficient on the Shock Wave Front [J]. Explosion and Shock Waves, 1989, 9(1): 61-67. (in Chinese) 刘仓理. 冲击波阵面上粘度的一种唯象描述 [J]. 爆炸与冲击, 1989, 9(1): 61-67. Zhang R Q. The Viscous Coefficient of Elastic-Viscoplastic Solids under Shock Loading [J]. Explosion and Shock Waves, 1984, 4(2): 16-21. (in Chinese) 张若棋. 在冲击载荷下弹-粘塑性固体的粘性系数 [J]. 爆炸与冲击, 1984, 4(2): 16-21. Sakharov A D, Zaidel R M, Mineev V N, et al. Experimental Investigation of the Stability of Shock Waves and the Mechanical Properties of Substances at High Pressures and Temperatures [J]. Sov Phys Doklady, 1965, 9: 1019-1022. Mineev V N, Mineev A V. Viscosity of Metals under Shock-Loading Conditions [J]. J Phys Ⅳ France, 1997, C3: 583-585. Godunov S K, Deribas A A, Kozin N S. Wave Formation in Explosive Welding [J]. J Appl Mech Tech Phys USSR, 1971, 12(3): 398-406. Mineev V N, Funtikov A I. Viscosity Measurements on Metal Melts at High Pressure and Viscosity Calculations for the Earth's Core [J]. Physics-Uspekhi, 2004, 47(7): 671-686. Liu F S, Yang M X, Lin Q W, et al. Shear Viscosity of Aluminum under Shock Compression [J]. Chinese Physics Letters, 2005, 22(3): 747-749. Marsh S P. LASL Shock Hugoniot Data [M]. Berkley: University of California Press, 1980: 260-261. Zaidel R M. Development of Perturbations in Plane Shock Waves [J]. J Appl Mech Tech Phys USSR, 1967, 8(4): 20-25.
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