Plasticity at High Pressures and Strain Rates Using Oblique-Impact Isentropic-Compression Experiments

Technical Report · Mon Mar 22 00:00:00 EDT 2010

DOI:https://doi.org/10.2172/1116940· OSTI ID:1116940

Florando, Jeff N. ^[1]; Jiao, Tong ^[2]; Grunschel, Stephen E. ^[2]; Clifton, Rodney J. ^[2]; Lassila, David H. ^[1]; Ferranti, Jr., Louis ^[1]; Becker, Richard C. ^[1]; Minich, Roger W. ^[1]; Bazan, Grant ^[1]

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

Related Subjects

36 MATERIALS SCIENCE