Steinberg-Guinan Model for High-Pressure Carbon, Diamond Phase.

Orlikowski, D. ; Correa, A. ; Schwegler, E. ; Klepeis, J.

Technical Information Center Oak Ridge Tennessee

关键词: Carbon;    Diamonds;    Compression;    Functionals;    Hydrodynamics;   

RP-ID  :  DE2008921527

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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.