Analysis of geometrical defects in overhang fabrications in electron beam melting based on thermomechanical simulations and experimental validations
| Autor: | François Villeneuve, Yann Ledoux, Frédéric Vignat, Thanh Hoang Vo, Alex Ballu, Soukaina Ghaoui, Matthieu Museau |
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| Přispěvatelé: | Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Conception Produit Process (G-SCOP_CPP ), Laboratoire des sciences pour la conception, l'optimisation et la production (G-SCOP), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), ANR-17-CE10-0004,GEOCAM,Maîtrise géométrique des pièces produites par fabrication additive métallique(2017) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Work (thermodynamics) Experimental validation Materials science Biomedical Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Electron beam melting [SPI.MECA.GEME]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph] Thermomechanical simulation 020901 industrial engineering & automation Amplitude Volume (thermodynamics) Geometrical defects Residual stress Cathode ray General Materials Science Composite material 0210 nano-technology Engineering (miscellaneous) Layer (electronics) Overhang geometry Shrinkage |
| Zdroj: | Additive Manufacturing Additive Manufacturing, Elsevier, 2020, 36, pp.101557. ⟨10.1016/j.addma.2020.101557⟩ |
| ISSN: | 2214-8604 2214-7810 |
| DOI: | 10.1016/j.addma.2020.101557⟩ |
| Popis: | International audience; Electron Beam Melting is an innovative process for the production of massive parts with minimum support structures and negligible residual stress. However, some geometries, such as overhang volumes, still pose a challenge to manufacture and can result in non-negligible geometrical defects such as “side loss”. Based on thermomechanical simulations, the aim of this work is to understand the reasons for the appearance of this defect and its evolution throughout successive layer depositions. Simulation results indicate that side loss is due to the repetitive force applied by the new layers on the previous ones due to the fast shrinkage in the top of the part. In addition, both simulation and experimental analysis show an increase in the defect amplitude with increasing thickness of the overhang volume and its stabilization after the first millimeters of the overhang volume. |
| Databáze: | OpenAIRE |
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