Integración del Modelo Visco-Plástico Autoconsistente con Leyes bajo Irradiación de Creep y Crecimiento en el Código de Elementos Finitos Code Aster
DOI:
https://doi.org/10.70567/mc.v41i26.133Palavras-chave:
Creep y Crecimiento bajo irradiación, Material Policristalino, Anisotropía, Microestructura, UserMATerial (UMAT), Elementos FinitosResumo
Se presenta la integración del modelo policristalino viscoplástico autoconsistente (VPSC) en el marco de elementos finitos (FE), usando el software Code Aster. Este modelo incorpora las leyes de creep y crecimiento bajo irradiación en un cristal simple. En cada punto de integración de los elementos finitos se define un sistema de coordenadas local, considerando un policristal con textura inicial. La interfaz VPSC-FE, construida con la subrutina UMAT, permite la comunicación entre escalas meso y macroscópica; aunque el modelo VPSC solo resuelve la deformación viscoplástica para un estado de tensiones, la interfaz incorpora la deformación elástica macroscópica. La integración resultante simula la respuesta mecánica de un cuarto de tubo de revestimiento de Zircaloy-2, primero bajo presión interna y luego solo a tracción bajo irradiación, evaluando efectos de textura y precisión respecto al modelo VPSC independiente.
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