Integration of the Self-Consistent Visco-Plastic Model with Laws under Creep Irradiation and Growth in the Finite Element Code Aster

Authors

  • Fabrizio E. Aguzzi Llubel Instituto de Física de Rosario (CONICET-Universidad Nacional de Rosario). Rosario, Argentina.
  • Javier W. Signorelli Universidad Nacional de Rosario, Facultad de Ciencias Exactas, Ingeniería y Agrimensura & Instituto de Física de Rosario (CONICET-Universidad Nacional de Rosario). Rosario, Argentina.

DOI:

https://doi.org/10.70567/mc.v41i26.133

Keywords:

Creep and Irradiation Growth, Polycrystalline Material, Anisotropy, Microstructure, UserMATerial (UMAT), Finite Elements

Abstract

The integration of the self-consistent viscoplastic polycrystalline (VPSC) model into the finite element (FE) framework using the Code Aster software is presented. This model incorporates creep and growth laws under irradiation in a single crystal. A local coordinate system is defined at each integration point of the finite elements, considering a polycrystal with initial texture. The VPSC-FE interface, built with the UMAT subroutine, enables communication between meso and macroscopic scales; although the VPSC model only resolves viscoplastic deformation for a stress state, the interface incorporates macroscopic elastic deformation. The resulting integration simulates the mechanical response of a quarter Zircaloy-2 cladding tube, first under internal pressure and then under uniaxial tension during irradiation, evaluating texture effects and accuracy with respect to the standalone VPSC model.

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Published

2024-11-08

Issue

Vol. 41 No. 26 (2024): Special Session in Tribute to Prof. Javier Signorelli

Section

Conference Papers in MECOM 2024

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