Effect of Finite Element Mesh Size and Time-Increment on Predicting Part-Scale Temperature for Powder Bed Fusion Process

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2022
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
341-348
Series
Achievements and Trends in Material Forming- Peer-reviewed extended papers selected from the 25th International Conference on Material Forming, ESAFORM 2022, Key Engineering Materials, Volume 926
Abstract
Simulating powder bed fusion processes (PBF) can reveal temperature evolution in transient mode. Accurate temperature prediction using finite element (FE) method demands both mesh and time increments to be very small; thus, requiring a high computational cost. To avoid this, in part-scale simulation, coarse meshes representing multiple powder layers added at once, are usually used which results in fast solving of FE models. Powder layers and time increments are lumped in such a configuration, which results in a deviation of the temperature history. This research proposes a methodology to predict the nodal temperature (NT) due to the combined effect of space and time lumping for part-scale FE thermal simulation for PBF processes. It shows its effects in predicting both the local temperature history and the average far-field temperature.
Description
Publisher Copyright: © 2022 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.
Keywords
FE simulation, mesh and time lumping, Powder bed fusion, residual stress prediction, thermal history
Other note
Citation
Ullah, R, Lian, J, Wu, J & Niemi, E 2022, Effect of Finite Element Mesh Size and Time-Increment on Predicting Part-Scale Temperature for Powder Bed Fusion Process . in G Vincze & F Barlat (eds), Achievements and Trends in Material Forming- Peer-reviewed extended papers selected from the 25th International Conference on Material Forming, ESAFORM 2022 . Key Engineering Materials, vol. 926, Trans Tech Publications, pp. 341-348, International ESAFORM Conference on Material Forming, Braga, Portugal, 27/04/2022 . https://doi.org/10.4028/p-16auf3