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

doi:10.1088/1674-1056/23/9/096204

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.

Keywords: shock shear viscosity elastoplasticity

Received: 12 December 2013
Revised: 13 March 2014
Accepted manuscript online:

PACS:	62.50.-p	(High-pressure effects in solids and liquids)
	62.10.+s	(Mechanical properties of liquids)
	62.20.D-	(Elasticity)
	62.20.fq	(Plasticity and superplasticity)

Fund: 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).

Corresponding Authors: Ma Xiao-Juan
E-mail: jxmzjm@126.com

Cite this article:

Ma Xiao-Juan (马小娟), Hao Bin-Bin (郝斌斌), Ma Hai-Xia (马海霞), Liu Fu-Sheng (刘福生) Shear viscosity of aluminum studied by shock compression considering elasto-plastic effects 2014 Chin. Phys. B 23 096204

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

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