Plasticity at High Pressures and Strain Rates Using Oblique-Impact Isentropic-Compression Experiments
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Brown Univ., Providence, RI (United States)
Part of LLNL’s national security mission is reliant on accurate simulations of high strain-rate plastic flow (nonreversible deformation) under conditions of high hydrostatic pressures. In an effort to help advance the predictive capability of LLNL’s multiscale modeling program a new experimental technique has been developed to provide strength properties under conditions of high strain rate (104 -106 s-1) and high hydrostatic pressure (1- 100 GPa). The oblique-impact experiments allow for the shearing response of the material to be independently measured while the material is under pressure. The strength of the material is then inferred by conducting 2-D hydrodynamic simulations to match to the experimentally measured velocity profiles. Utilizing this technique, Cu and V experiments have been conducted that establish the utility of this technique to measure strength under dynamic conditions.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48; AC52-07NA27344
- OSTI ID:
- 1116940
- Report Number(s):
- LLNL-TR-426279
- Country of Publication:
- United States
- Language:
- English
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