Void Growth and Coalescence Nanocrystalline Metals: Molecular Dynamics Modeling, Continuum Modeling, and Experiments

ORAL

Abstract

Fragmentation of the support structures in ICF experiments, leading to the damage of instrumentation and optics, is currently a concern as new research facilities are brought on line. The current research focuses on understanding the void formation and growth mechanisms. MD simulations in single and poly-crystalline nano-materials have been carried out with LAMMPS. Void growth occurred by the emission of shear dislocation loops. Continuum finite difference calculations of the same Vornoi-generated microstructure were also performed using ALE-AMR. The results of the calculations are compared to each other and to laser shock experiments in thin vanadium films. This research was supported by LLNL grant B558558.

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Authors

  • David J. Benson

    • UCSD
    • University of California, San Diego
    • Dept. of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA 92093-0411

  • Sirirat Traiviratana

    • UCSD

  • M. Meyers

    • UCSD
    • University of California, San Diego
    • UC San Diego

  • Parag Dixit

    • UCSD

  • Alice Koniges

    • LLNL

  • Dan Kalantar

    • LLNL