Implementation of a thermomechanical model for the simulation of selective laser melting
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- DE-AC52-07NA27344
- OSTI ID:
- 1150043
- Report Number(s):
- LLNL-JRNL-647013
- Journal Information:
- Computational Mechanics, Vol. 54, Issue 1; ISSN 0178-7675
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
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