Hamide, Makhlouf (2008) Numerical modelling of steel arc welding. PhD thesis Mécanique numérique, CEMEF - Centre de Mise en Forme des Matériaux, ENSMP p.275.
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Abstract
Welding is a highly used assembly technique. Welding simulation software would give access to residual stresses and information about the weld's microstructure, in order to evaluate the mechanical resistance of a weld. It would also permit to evaluate the process feasibility when complex geometrical components are to be made, and to optimize the welding sequences in order to minimize defects. This work deals with the numerical modelling of arc welding process of steels. After describing the industrial context and the state of art, the models implemented in TransWeld ( software developed at CEMEF) are presented. The set of macroscopic equations is followed by a discussion on their numerical implementation. Then, the theory of remeshing and our adaptive anisotropic remeshing strategy are explained. Two welding metal addition techniques are investigated and are compared in terms of the joint size and transient temperature and stresses. The accuracy of the finite element model is evaluated based on experimental results and the results of the analytical solution. Comparative analysis between experimental and numerical results allows the assessment of the ability of the numerical code to predict the thermomechanical and metallurgical response of the welded structure. The models limitations and the phenomena identified during this study are finally discussed and permit to define interesting orientations for future developments.
| Item Type: | PhD Thesis (PhD) |
|---|---|
| PhD Supervisor: | Bellet, Michel and Massoni, Elisabeth |
| Date: | 17 July 2008 |
| Board of examiners: | Bergheau, Jean-Michel and Pilvin, Philippe and Chauvy, Cédric and Lasne, Patrice and Bellet, Michel and Massoni, Elisabeth and Billardon, René |
| Ecole Doctorale: | ED 364 SCIENCES FONDAMENTALES ET APPLIQUEES |
| Discipline: | Mécanique numérique |
| Collection (Fonds): | Mines ParisTech (ENSMP) |
| Institution: | ENSMP |
| Department: | CEMEF - Centre de Mise en Forme des Matériaux |
| Subjects: | 4. Materials Science, Mechanics and Mechanical Engineering |
| Uncontrolled Keywords: | Soudage, élément fini, Thermique, Mécanique, Transformation phase, Remaillage adaptatif, Apport de matière, Zone fondue, Welding, Finite element, Heat transfer, Mechanics, Phase transformation, Mesh adaptation, Metal addition, Fusion zone |
| ID Code: | 4135 |
| Deposited By: | Brigitte HANOT |
| Deposited On: | 20 October 2008 |
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