Quantitative Analysis of Propagation of Shock Waves in <100> Direction of Fcc Metal Generated by HVI

It is difficult to determine experimentally the nanometer level structure of shockwave in solid materials. In present study, molecular dynamics (MD) simulation is performed to clarify quantitatively the structure of propagating shockwave in fcc crystalline Al in <100> direction. Simulated metal/metal collision system is similar to the equipment of the split Hopkinson pressure bar which is used for a high-speed deformation test. The non-closed pack (100) crystal plane of the fcc crystal is the collision plane. A new fitting function is suggested for the sturucture of the shock wave. The fitting function has many parameters. The time dependence of these parameters are analyzed.