CAMBON Camille
Fonction : Doctorante
camille.cambon
umontpellier.fr
0467143504
Bureau: 313, Etg: 3, Bât: 2 - Site : Saint-Priest
Domaines de Recherche: - Sciences de l'ingénieur/Génie des procédés
- Sciences de l'ingénieur/Matériaux
- Sciences de l'ingénieur/Mécanique/Génie mécanique
- Sciences de l'ingénieur/Mécanique/Mécanique des solides
- Sciences de l'ingénieur/Mécanique/Thermique
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Productions scientifiques :
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Thermo-mechanical simulation of overlaid layers made with wire + arc additive manufacturing and GMAW-cold metal transfer 
Auteur(s): Cambon C., Rouquette S., Bendaoud I., Bordreuil C., Wimpory R., Soulie F.
(Article) Publié:
Welding In The World, vol. p. (2020)
Ref HAL: hal-02890140_v1
DOI: 10.1007/s40194-020-00951-x
Exporter : BibTex | endNote
Résumé: A thermo-mechanical simulation of the wire + arc additive manufacturing (WAAM) process is presented in this work. The simulation consists in the deposition of 5 successive layers of 316 L stainless steel on a 316 L base plate. The thermo-mechanical analysis is solved in two dimensions under plane stress assumption. Nonetheless, the metal addition is taking into account in this numerical analysis. An increment of material is added at each time step. This numerical approach allows reducing the computational time. The temperature and residual stress fields are computed at each time step. Two patterns of deposition strategy are also investigated. It is shown that the longitudinal stress varies mainly along the vertical axis. A sample with 5 overlaid layers has been scanned with neutron diffraction technique in order to measure the final residual stresses. Both numerical and measured residual stresses are in good agreement. The Aster finite element software is employed for the numerical analysis.
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Influence of the first weld bead on strain and stress states in wire+arc additive manufacturing
Auteur(s): Cambon C., Bendaoud I., Rouquette S., Soulie F.
Conference: The 12th International Seminar "Numerical Analysis of Weldability" (Seggau, AT, 2018-09-23)
Actes de conférence: , vol. p. ()
Ref HAL: hal-01954354_v1
Exporter : BibTex | endNote
Résumé: WAAM (Wire+Arc Additive Manufacturing) allows manufacturing mechanical components by adding successive layers of molten metallic wire using electrical arc. The WAAM process, compared to other processes using metallic powders, presents some advantages such as: high deposition rate (2-4kg/hour), manufacturing of large scales components and cheaper industrial installations. WAAM is then an interesting candidate for manufacturing components often CNC machined. However, the main disadvantages of this process are: high surface roughness requiring a post machining, strains and stresses states generated during the deposition process [1]. A better understanding of the relation between the welding parameters and the state of stresses can contribute to minimize residual stresses, eventually in relation with a deposition strategy [2]. As a first approach, the effects of the first deposition of molten metal on the base plate is investigated. This work focuses on finite element method, based on Code Aster solver, with a nonlinear thermo-mechanical model. Concerning the thermal aspects, the GMAW heat input is modeled by a Gaussian distribution [3]. The temperature fields are used to solve the mechanical problem. The material behavior laws are assumed to be elastoplastic with different hardening configurations: no hardening, linear isotropic or kinematic hardening and non-linear isotropic hardening. Based on the results from these elastoplastic models, the influence of the hardening is presented.
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