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

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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.

Original languageEnglish
Title of host publicationAchievements and Trends in Material Forming- Peer-reviewed extended papers selected from the 25th International Conference on Material Forming, ESAFORM 2022
EditorsGabriela Vincze, Frédéric Barlat
PublisherTRANS TECH PUBLICATIONS
Pages341-348
Number of pages8
ISBN (Print)9783035717594
DOIs
Publication statusPublished - 2022
MoE publication typeA4 Article in a conference publication
EventInternational ESAFORM Conference on Material Forming - Braga, Portugal
Duration: 27 Apr 202229 Apr 2022
Conference number: 25

Publication series

NameKey Engineering Materials
Volume926
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

ConferenceInternational ESAFORM Conference on Material Forming
Abbreviated titleESAFORM
Country/TerritoryPortugal
CityBraga
Period27/04/202229/04/2022

Keywords

  • FE simulation
  • mesh and time lumping
  • Powder bed fusion
  • residual stress prediction
  • thermal history

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