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

作     者：马小娟 郝斌斌 马海霞 刘福生 

作者机构：Institute of High Temperature and High Pressure PhysicsKey Laboratory of Advanced Technologies of Materials of the Ministry of EducationSouthwest Jiaotong University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2014年第23卷第9期

页      面：331-334页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.11002120) the Fundamental Research Funds for the Central Universities,China(Grant No.2682014ZT31) 

主　　题：shock shear viscosity elastoplasticity 

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 elasto-plasticity 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.