中国物理B ›› 2011, Vol. 20 ›› Issue (6): 68301-068301.doi: 10.1088/1674-1056/20/6/068301

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Viscosity of aluminum under shock-loading conditions

马小娟, 刘福生, 张明建, 孙燕云   

  1. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
  • 收稿日期:2010-10-29 修回日期:2010-11-24 出版日期:2011-06-15 发布日期:2011-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11002120 and 10974160).

Viscosity of aluminum under shock-loading conditions

Ma Xiao-Juan (马小娟), Liu Fu-Sheng (刘福生), Zhang Ming-Jian (张明建), Sun Yan-Yun (孙燕云)   

  1. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2010-10-29 Revised:2010-11-24 Online:2011-06-15 Published:2011-06-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11002120 and 10974160).

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摘要： A reliable data treatment method is critical for viscosity measurements using the disturbance amplitude damping method of shock waves. In this paper the finite difference method is used to obtain the numerical solutions for the disturbance amplitude damping behaviour of the sinusoidal shock front in a flyer-impact experiment. The disturbance amplitude damping curves are used to depict the numerical solutions of viscous flow. By fitting the experimental data to the numerical solutions of different viscosities, we find that the effective shear viscosity coefficients of shocked aluminum at pressures of 42, 78 and 101 GPa are (1500±100) Pa·s, (2800±100) Pa·s and (3500±100) Pa·s respectively. It is clear that the shear viscosity of aluminum increases with an increase in shock pressure, so aluminum does not melt below a shock pressure of 101 GPa. This conclusion is consistent with the sound velocity measurement.

Abstract: A reliable data treatment method is critical for viscosity measurements using the disturbance amplitude damping method of shock waves. In this paper the finite difference method is used to obtain the numerical solutions for the disturbance amplitude damping behaviour of the sinusoidal shock front in a flyer-impact experiment. The disturbance amplitude damping curves are used to depict the numerical solutions of viscous flow. By fitting the experimental data to the numerical solutions of different viscosities, we find that the effective shear viscosity coefficients of shocked aluminum at pressures of 42, 78 and 101 GPa are (1500±100) Pa·s, (2800±100) Pa·s and (3500±100) Pa·s respectively. It is clear that the shear viscosity of aluminum increases with an increase in shock pressure, so aluminum does not melt below a shock pressure of 101 GPa. This conclusion is consistent with the sound velocity measurement.

Key words: shear viscosity, aluminum, shock-load

中图分类号:  (Viscosity measurements)

  • 83.85.Jn
66.20.-d (Viscosity of liquids; diffusive momentum transport) 47.40.-x (Compressible flows; shock waves)