Evaluation of an Eulerian multi-material mixture formulation based on a single inverse deformation gradient tensor field

Journal Article · 31 December 2017 · Center for Turbulence Research Annual Briefs

OSTI ID:1423820

Ghaisas, N. S. ^[1]; Subramaniam, A. ^[1]; Lele, S. K. ^[1]; Cook, A. W. ^[2]

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1. Stanford Univ., CA (United States)
2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

We report high energy-density solids undergoing elastic-plastic deformations coupled to compressible fluids are a common occurrence in engineering applications. Examples include problems involving high-velocity impact and penetration, cavitation, and several manufacturing processes, such as cold forming. Numerical simulations of such phenomena require the ability to handle the interaction of shock waves with multi-material interfaces that can undergo large deformations and severe distortions. As opposed to Lagrangian (Benson 1992) and arbitrary Lagrangian-Eulerian (ALE) methods (Donea et al. 2004), fully Eulerian methods use grids that do not change in time. Consequently, Eulerian methods do not suffer from difficulties on account of mesh entanglement, and do not require periodic, expensive, remap operations.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 1423820
• Report Number(s): LLNL-JRNL-741479
• Journal Information: Center for Turbulence Research Annual Briefs, Vol. 2017; ISSN 9999-0013
• Publisher: Stanford UniversityCopyright Statement
• Country of Publication: United States
• Language: English