scholarly journals Erratum: “Transient dynamics and stability of keyhole at threshold in laser powder bed fusion regime investigated by finite element modeling” [J. Laser Appl. 33, 012024 (2021)]

2021 ◽  
Vol 33 (2) ◽  
pp. 029902
Author(s):  
Yaasin A. Mayi ◽  
Morgan Dal ◽  
Patrice Peyre ◽  
Michel Bellet ◽  
Charlotte Metton ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Transient Dynamics ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Element Modeling

scholarly journals Transient dynamics and stability of keyhole at threshold in laser powder bed fusion regime investigated by finite element modeling

2021 ◽  
Vol 33 (1) ◽  
pp. 012024
Author(s):  
Yaasin A. Mayi ◽  
Morgan Dal ◽  
Patrice Peyre ◽  
Michel Bellet ◽  
Charlotte Metton ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Transient Dynamics ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Element Modeling

Experimental validation of finite element modeling for laser powder bed fusion deformation

2016 ◽  
Vol 12 ◽  
pp. 108-120 ◽  
Author(s):  
Alexander J. Dunbar ◽  
Erik R. Denlinger ◽  
Michael F. Gouge ◽  
Pan Michaleris
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Experimental Validation ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Element Modeling

scholarly journals Finite element modeling of powder bed fusion at part scale by a super-layer deposition method based on level set and mesh adaptation

2021 ◽  
pp. 1-26
Author(s):  
Yancheng Zhang ◽  
Charles-André Gandin ◽  
Michel Bellet
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Level Set ◽  
Mesh Adaptation ◽  
Layer By Layer ◽  
Powder Bed Fusion ◽  
Deposition Method ◽  
Powder Bed ◽  
Element Modeling ◽  
Layer Deposition

Abstract A super-layer deposition method is developed for 3D macroscopic finite element modeling of heat transfer at part scale during the powder bed fusion (PBF) process. The proposed super-layer strategy consists of the deposition of batches of several layers. The main consideration is to deal with the effective heating times and with the inter-layer dwell time in a reasonable way. The material is deposited at once for each super-layer thanks to level-set and mesh adaptation methods, while the energy input is prescribed, either by respecting the layer-by-layer thermal cycle, or in a single thermal load. The level set method is used twice: first to track the interface between gas and the successive super-layers of powder bed and; second to track the interface between the part in construction and the non-exposed powder. To preserve simulation accuracy, adaptive remeshing is used to maintain a fine mesh near the evolving construction front during the process. Simulation results obtained by means of this super-layer method are presented and discussed by comparison with those obtained by layer-by-layer strategy, considered here as a reference. It is shown that, when respecting certain conditions, temperature evolutions and distributions approaching the reference ones can be obtained with significant savings on computation time. Assessment is first performed on simple part, then on a more complex configuration.

Closed-Loop Simulation Integrating Finite Element Modeling With Feedback Controls in Powder Bed Fusion Additive Manufacturing

2020 ◽  
Author(s):  
Dan Wang ◽  
Xu Chen
Keyword(s):  
Finite Element ◽  
Additive Manufacturing ◽  
Finite Element Modeling ◽  
Closed Loop ◽  
Agile Manufacturing ◽  
Powder Bed Fusion ◽  
Powder Bed ◽  
Element Modeling ◽  
Melt Pool ◽  
Wide Range

Abstract Powder bed fusion (PBF) additive manufacturing has enabled unmatched agile manufacturing of a wide range of products from engine components to medical implants. While high-fidelity finite element modeling and feedback control have been identified key for predicting and engineering part qualities in PBF, existing results in each realm are developed in opposite computational architectures wildly different in time scale. Integrating both realms, this paper builds a first-instance closed-loop simulation framework by utilizing the output signals retrieved from the finite element model (FEM) to directly update the control signals sent to the model. The proposed closed-loop simulation enables testing the limits of advanced controls in PBF and surveying the parameter space fully to generate more predictable part qualities. Along the course of formulating the framework, we verify the FEM by comparing its results with experimental and analytical solutions and then use the FEM to understand the melt-pool evolution induced by the in-layer thermomechanical interactions. From there, we build a repetitive control algorithm to greatly attenuate variations of the melt pool width.

scholarly journals Estimates of the mechanical properties of laser powder bed fusion Ti-6Al-4V parts using finite element models

2019 ◽  
Vol 169 ◽  
pp. 107678 ◽  
Author(s):  
Qi Zhang ◽  
Jiawen Xie ◽  
Tyler London ◽  
David Griffiths ◽  
Imran Bhamji ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Finite Element Models ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed
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