A Steinberg-Guinan model for High-Pressure Carbon, Diamond Phase

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Since the carbon, diamond phase has such a high yield strength, dynamic simulations must account for strength even for strong shock waves ({approx} 3 Mbar). We have determined an initial parametrization of two strength models: Steinberg-Guinan (SG) and a modified or improved SG, that captures the high pressure dependence of the calculated shear modulus up to 10 Mbar. The models are based upon available experimental data and on calculated elastic moduli using robust density functional theory. Additionally, we have evaluated these models using hydrodynamic simulations of planar shocks experiments.

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6 p. (0.2 MB)

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Orlikowski, D; Correa, A; Schwegler, E & Klepeis, J July 27, 2007.

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Description

Since the carbon, diamond phase has such a high yield strength, dynamic simulations must account for strength even for strong shock waves ({approx} 3 Mbar). We have determined an initial parametrization of two strength models: Steinberg-Guinan (SG) and a modified or improved SG, that captures the high pressure dependence of the calculated shear modulus up to 10 Mbar. The models are based upon available experimental data and on calculated elastic moduli using robust density functional theory. Additionally, we have evaluated these models using hydrodynamic simulations of planar shocks experiments.

Physical Description

6 p. (0.2 MB)

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PDF-file: 6 pages; size: 0.2 Mbytes

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  • Presented at: Shock Compression of Condensed Matter, Kona, HI, United States, Jun 25 - Jun 29, 2007

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  • Report No.: UCRL-PROC-233156
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 921527
  • Archival Resource Key: ark:/67531/metadc898183

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  • July 27, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • April 17, 2017, 12:14 p.m.

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Orlikowski, D; Correa, A; Schwegler, E & Klepeis, J. A Steinberg-Guinan model for High-Pressure Carbon, Diamond Phase, article, July 27, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc898183/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.