[SY-G3] Symposium G-3

[SY-G3] Modeling and simulation of shock waves in solids using branched Hugoniots

Jae-Wan Lee¹, Jimin Choi¹, Keonwook Kang¹, Soonho Song¹, ^○Won-Suk Ohm¹, Jung Su Park² (1.Yonsei University, Korea, 2.Agency for Defense Development, Korea)

Shock compression is an effective means of probing the mechanical and thermodynamic properties of solids. The majority of shock compression studies to date have reported principal Hugoniot curves, for which the material ahead of the shock is conveniently chosen to be in the quiescent state (P = 0 and u = 0). However, studies of branched Hugoniots (that emanate from non-quiescent states) are relatively rare, although branched Hugoniots are equally important for accurate description of shock wave physics involving interaction. In this talk, we discuss a sophisticated modeling scheme for shock hydrodynamics, accompanied by a full deck of principal and branched Hugoniots obtained with molecular dynamics computations. The system is a single-crystalline aluminum impacted at velocities ranging from 0.1 to 3.0 km/s, as described in the companion paper. Simulations show that branched Hugoniots should be used for accuracy in predictions, especially when there are material boundaries causing reflection and interaction of shocks.