›› 2014, Vol. 23 ›› Issue (9): 96204-096204.doi: 10.1088/1674-1056/23/9/096204

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Shear viscosity of aluminum studied by shock compression considering elasto-plastic effects

马小娟, 郝斌斌, 马海霞, 刘福生   

  1. Institute of High Temperature and High Pressure Physics, Key Laboratory of Advanced Technologies of Materials of the Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
  • 收稿日期:2013-12-12 修回日期:2014-03-13 出版日期:2014-09-15 发布日期:2014-09-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11002120) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2682014ZT31).

Shear viscosity of aluminum studied by shock compression considering elasto-plastic effects

Ma Xiao-Juan (马小娟), Hao Bin-Bin (郝斌斌), Ma Hai-Xia (马海霞), Liu Fu-Sheng (刘福生)   

  1. Institute of High Temperature and High Pressure Physics, Key Laboratory of Advanced Technologies of Materials of the Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2013-12-12 Revised:2014-03-13 Online:2014-09-15 Published:2014-09-15
  • Contact: Ma Xiao-Juan E-mail:jxmzjm@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11002120) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2682014ZT31).

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摘要： The strength always exists before the material melts. In this paper, the viscoelastic-plastic model is applied to improve the finite difference method, and the numerical solutions for the disturbance amplitude damping behavior of the sinusoidal shock front in a flyer-impact experiment are obtained. When the aluminum is shocked to 101 GPa, the effect of elastoplasticity on the zero-amplitude point of the oscillatory damping curve is the same as that of viscosity when η=700 Pa·s, and the real shear viscosity coefficient of the shocked aluminum is determined to be about 2800±100 Pa·s. Comparing the experiment data with the numerical results of the viscoelastic-plastic model, we find that the aluminum is close to melting at 101 GPa.

关键词: shock, shear viscosity, elastoplasticity

Abstract: The strength always exists before the material melts. In this paper, the viscoelastic-plastic model is applied to improve the finite difference method, and the numerical solutions for the disturbance amplitude damping behavior of the sinusoidal shock front in a flyer-impact experiment are obtained. When the aluminum is shocked to 101 GPa, the effect of elastoplasticity on the zero-amplitude point of the oscillatory damping curve is the same as that of viscosity when η=700 Pa·s, and the real shear viscosity coefficient of the shocked aluminum is determined to be about 2800±100 Pa·s. Comparing the experiment data with the numerical results of the viscoelastic-plastic model, we find that the aluminum is close to melting at 101 GPa.

Key words: shock, shear viscosity, elastoplasticity

中图分类号:  (High-pressure effects in solids and liquids)

  • 62.50.-p
62.10.+s (Mechanical properties of liquids) 62.20.D- (Elasticity) 62.20.fq (Plasticity and superplasticity)