A finite volume alternate direction implicit approach to modeling selective laser melting

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Abstract

Over the last decade, several studies have attempted to develop thermal models for analyzing the selective laser melting process with a vision to predict thermal stresses, microstructures and resulting mechanical properties of manufactured products. While a holistic model addressing all involved phenomena is yet to emerge, the existing partial models have already become computationally heavy. This is observed to go hand-in-hand with a trend across literature for the usage of finite element (FE) formulations for developing implicit 3D models. However, the 3D implicit FE models, though able to accurately simulate the process, are constrained by either the size or scale of the model domain. A second challenging aspect involves the inclusion of non-linear material behavior into the 3D implicit FE models. An alternating direction implicit (ADI) method based on a finite volume (FV) formulation is proposed for modeling single-layer and few-layers selective laser melting processes. The ADI technique is implemented and applied for two cases involving constant material properties and non-linear material behavior. The ADI FV method consume less time while having comparable accuracy with respect to 3D implicit FE models. Drawing on the comparative results, appropriate models are recommended for different scenarios and modeling domains.
Original languageEnglish
Title of host publicationICALEO 2013 - 32nd International Congress on Applications of Lasers and Electro-Optics
Number of pages8
Publication date2013
Pages91-98
Publication statusPublished - 2013
Event32nd International Congress on Applications of Lasers and Electro-Optics - Miami, FL, United States
Duration: 6 Oct 201310 Oct 2013
Conference number: 32

Conference

Conference32nd International Congress on Applications of Lasers and Electro-Optics
Number32
Country/TerritoryUnited States
CityMiami, FL
Period06/10/201310/10/2013
SeriesICALEO 2013 - 32nd International Congress on Applications of Lasers and Electro-Optics

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