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Computational Mechanics
Erschienen in: Computational Mechanics 1/2014

01.07.2014 | Original Paper

Implementation of a thermomechanical model for the simulation of selective laser melting

verfasst von: N. E. Hodge, R. M. Ferencz, J. M. Solberg

Erschienen in: Computational Mechanics | Ausgabe 1/2014

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Abstract

Selective laser melting (SLM) is an additive manufacturing process in which multiple, successive layers of metal powders are heated via laser in order to build a part. Modeling of SLM requires consideration of both heat transfer and solid mechanics. The present work describes continuum modeling of SLM as envisioned for eventual support of part-scale modeling of this fabrication process to determine end-state information such as residual stresses and distortion. The determination of the evolving temperatures is dependent on the material, the state of the material (powder or solid), the specified heating, and the configuration. Similarly, the current configuration is dependent on the temperatures, the powder-solid state, and the constitutive models. A multi-physics numerical formulation is required to solve such problems. This article describes the problem formulation, numerical method, and constitutive parameters necessary to solve such a problem. Additionally, various verification and example problems are simulated in the parallel, multi-physics finite element code Diablo, and the results presented herein.
Vorheriger Artikel Controlling vibrations of a cutting process using predictive control
Nächster Artikel Toward robust and accurate contact solvers for large deformation applications: a remapping/adaptivity framework for mortar-based methods

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Fußnoten
1
Recall that \(\lambda \) is the optical thickness, defined as \(\lambda =\beta _h L\).
Table 2
Comparison of Diablo results to Gusarov et al. [17]
Quantity
Gusarov
Diablo
Maximum temperature \((\mathrm {K})\)
4900
5000
Length \((\mathrm {mm})\)
0.300
0.263
Width \((\mathrm {mm})\)
0.200
0.208
Depth \((\mathrm {mm})\)
0.070
0.065
 
2
Indeed, we envision further refinements of properties will occur as our research continues, but the values presented here are deemed sufficient to model the desired effects.
 
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Metadaten
Titel
Implementation of a thermomechanical model for the simulation of selective laser melting
verfasst von
N. E. Hodge
R. M. Ferencz
J. M. Solberg
Publikationsdatum
01.07.2014
Verlag
Springer Berlin Heidelberg
Erschienen in
Computational Mechanics / Ausgabe 1/2014
Print ISSN: 0178-7675
Elektronische ISSN: 1432-0924
DOI
https://doi.org/10.1007/s00466-014-1024-2

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