MESOSCALE SIMULATIONS OF POWDER COMPACTION
- Lawrence Livermore National Laboratory, P. O. Box 808, Livermore CA 94551 (United States)
Mesoscale 3D simulations of shock compaction of metal and ceramic powders have been performed with an Eulerian hydrocode GEODYN. The approach was validated by simulating a well-characterized shock compaction experiment of a porous ductile metal. Simulation results using the Steinberg material model and handbook values for solid 2024 aluminum showed good agreement with experimental compaction curves and wave profiles. Brittle ceramic materials are not as well studied as metals, so a simple material model for solid ceramic (tungsten carbide) has been calibrated to match experimental compaction curves. Direct simulations of gas gun experiments with ceramic powders have been performed and showed good agreement with experimental data. The numerical shock wave profile has same character and thickness as that measured experimentally using VISAR. The numerical results show reshock states above the single-shock Hugoniot line as observed in experiments. We found that for good quantitative agreement with experiments 3D simulations are essential.
- OSTI ID:
- 21366839
- Journal Information:
- AIP Conference Proceedings, Vol. 1195, Issue 1; Conference: American Physical Society Topical Group on shock compression of condensed matter, Nashville, TN (United States), 28 Jun - 3 Jul 2009; Other Information: DOI: 10.1063/1.3295052; (c) 2009 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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