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Avance del modelado de materiales en hydrocodes mediante un marco multiescala concurrente de elementos finitos y

Tim A Linke1,2, Dane M Sterbentz2, Jean-Pierre R Delplanque1

  • 1University of California, Davis, Department of Mechanical and Aerospace Engineering, California 95616, USA.

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Resumen
Este resumen es generado por máquina.

Este estudio presenta un marco de simulación multiescala que acopla el método de elementos finitos con la dinámica molecular. Este enfoque modela con precisión la física a microescala para materiales en condiciones extremas, ofreciendo una alternativa factible a los métodos tradicionales.

Palabras clave:
simulación multiescaladinámica molecularmétodo de elementos finitosmodelado de materialescondiciones extremasfísica de materiales

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Área de la Ciencia:

  • Física Computacional
  • Ciencia de Materiales
  • Modelado Multiescala

Sus antecedentes:

  • Las ecuaciones de estado (EOS) tradicionales tienen dificultades para incorporar física detallada a microescala.
  • Los modelos de grano grueso a menudo carecen de la resolución para comportamientos complejos de materiales.

Objetivo del estudio:

  • Presentar un novedoso marco de simulación multiescala que acopla el método de elementos finitos (FEM) con la dinámica molecular (MD).
  • Evitar los modelos tradicionales de EOS utilizando simulaciones atomísticas en línea para una mayor precisión.
  • Permitir la incorporación de física detallada a microescala en simulaciones de continuo.

Principales métodos:

  • Acoplamiento de FEM con simulaciones de MD para un enfoque concurrente continuo-atomístico.
  • Utilización de operadores de elevación y restricción para garantizar la coherencia del acoplamiento.
  • Validación del marco frente a datos experimentales y modelos convencionales de EOS.

Principales resultados:

  • El marco simula con éxito el flujo hidrodinámico inducido por choque en condiciones extremas.
  • La evaluación de la EOS atomística demostró ser una alternativa factible y eficiente a los métodos convencionales.
  • Demostró escalado débil con un 99% de eficiencia en el rendimiento computacional.

Conclusiones:

  • El marco desarrollado ofrece una herramienta poderosa para la modelización multiescala a gran escala.
  • Permite una representación precisa de la física a microescala en materiales bajo condiciones extremas.
  • El enfoque es una alternativa viable a los modelos EOS tradicionales, particularmente para materiales como el deuterio.