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Energetic materials at high compression: First-principles density functional theory and reactive force field studies

  • I. I. Oleynik
  • , M. Conroy
  • , S. V. Zybin
  • , L. Zhang
  • , A. C. Van Duin
  • , W. A. Goddard
  • , C. T. White
  • University of South Florida, Tampa
  • California Institute of Technology
  • Naval Research Laboratory

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Résumé

We report the results of a comparative study of pentaerythritol tetranitrate (PETN) at high compression using classical reactive interatomic potential ReaxFF and first-principles density functional theory (DFT). Lattice parameters of PETN I, the ground state structure at ambient conditions, is obtained by ReaxFF and two different density functional methods (plane wave and LCAO pseudopotential methods) and compared with experiment. Calculated energetics and isothermal equation of state (EOS) upon hydrostatic compression obtained by DFT and ReaxFF are both in good agreement with available experimental data. Our calculations of the hydrostatic EOS at zero temperature are extended to high pressures up to 50 GPa. The anisotropic characteristics of PETN upon uniaxial compression were also calculated by both ReaxFF and DFT.

langue originaleAnglais
titreSHOCK COMPRESSION OF CONDENSED MATTER - 2005
Sous-titreProceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pages573-576
Nombre de pages4
Les DOIs
étatPublié - 1 déc. 2006
Modification externeOui
EvénementSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter - Baltimore, MD, États-Unis
Durée: 31 juil. 20055 août 2005

Série de publications

NomAIP Conference Proceedings
Volume845 I
ISSN (imprimé)0094-243X
ISSN (Electronique)1551-7616

Une conférence

Une conférenceSHOCK COMPRESSION OF CONDENSED MATTER - 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pays/TerritoireÉtats-Unis
La villeBaltimore, MD
période31/07/055/08/05

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