Catálogo de publicaciones - tesis
Título de Acceso Abierto
Thermo-mecano-metallurgical modelling of welding: application to welded joints in nuclear power plants
Alejandro Cosimo Alberto Cardona Gustavo Sánchez Sarmiento Enrique Pardo Mario Storti Patricia Dardati
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Resumen/Descripción – provisto por el repositorio digital
The Thermo-Mecano-Metallurgical modelling of welding is considered in this thesis, where the high non-linearity and the multiphysics character of the problem makes necessary to study different areas of Computational Mechanics. Each of the main problems, specifically the thermal, the mechanical and the metallurgical problems, are separately investigated. In the case of the thermal problem, the primary complication is stated by the solid/liquid phase change. Classical formulations dealing with the solution of this problem suffer from instabilities associated to the discontinuity of the temperature gradient at the phase change boundary. This issue is studied in this work by considering an enriched finite element formulation. The mechanical behaviour of bodies during solidification is revisited and implemented as part of the Finite Element (FE) framework OOFELIE. In order to deal with the simulation of microstructure evolution, the conception of a computational tool flexible enough to describe a wide range of materials is undertaken. The high computational cost of welding problems is addressed by means of the formulation of Hyper-Reduced Order Models, and the parallelisation of the FE framework OOFELIE. It is shown that the speed-ups obtained with the proposed HROMs are good enough. The developed computational framework is applied to the solution of a real life application problem, more specifically, to the simulation of a large welded structure of a nuclear power plant for the prediction of WRS.Palabras clave – provistas por el repositorio digital
Computational welding mechanics; Enrichment scheme; Microstructure evolution; Parallel FEM; Reduced order models; HROM; Mecánica computacional de soldadura; Esquema de enriquecimiento; Evolución microestructural; FEM paralelo; Modelos de orden reducido
Disponibilidad
| Institución detectada | Año de publicación | Navegá | Descargá | Solicitá |
|---|---|---|---|---|
| No requiere | 2014 | Biblioteca Virtual de la Universidad Nacional del Litoral (SNRD) |
|
Información
Tipo de recurso:
tesis
Idiomas de la publicación
- inglés
País de edición
Argentina
Fecha de publicación
2014-11-17
