Molecular dynamics simulations of shock-induced plasticity in tantalum

Journal article

We present Non-Equilibrium Molecular Dynamics (NEMD) simulations of shock wave compression along the [001] direction in monocrystalline Tantalum, including pre-existing defects which act as dislocation sources. We use a new Embedded Atom Model (EAM) potential and study the nucleation and evolution of dislocations as a function of shock pressure and loading rise time. We find that the flow stress and dislocation density behind the shock front depend on strain rate. We find excellent agreement ...

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Authors: Tramontina, D; Erhart, P; Germann, T; Hawreliak, J; Higginbotham, A

• Publication status: Published
• Journal: HIGH ENERGY DENSITY PHYSICS
• Volume: 10
• Issue: 1
• Pages: 9-15
• Publication date: 2014-03-01
• DOI: 10.1016/j.hedp.2013.10.007
• ISSN: 1574-1818
• Keywords: Tantalum; Shocks; Molecular dynamics