History Reduction by Lumping for Time-Efficient Simulation of Additive Manufacturing
Additive manufacturing is the process by which material is added layer by layer. In most cases, many layers are added, and the passes are lengthy relative to their thicknesses and widths. This makes finite element simulations of the process computationally demanding owing to the short time steps and...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-12-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/10/1/58 |
| _version_ | 1818083280709222400 |
|---|---|
| author | Andreas Malmelöv Andreas Lundbäck Lars-Erik Lindgren |
| author_facet | Andreas Malmelöv Andreas Lundbäck Lars-Erik Lindgren |
| author_sort | Andreas Malmelöv |
| collection | DOAJ |
| description | Additive manufacturing is the process by which material is added layer by layer. In most cases, many layers are added, and the passes are lengthy relative to their thicknesses and widths. This makes finite element simulations of the process computationally demanding owing to the short time steps and large number of elements. The classical lumping approach in computational welding mechanics, popular in the 80s, is therefore, of renewed interest and is evaluated in this work. The method of lumping means that welds are merged. This allows fewer time steps and a coarser mesh. It was found that the computation time can be reduced considerably, with retained accuracy for the resulting temperatures and deformations. The residual stresses become, to a certain degree, smaller. The simulations were validated against a directed energy deposition (DED) experiment with alloy 625. |
| first_indexed | 2024-12-10T19:35:29Z |
| format | Article |
| id | doaj.art-ad9202a39c304d7fae6d01fc68b6ea17 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-10T19:35:29Z |
| publishDate | 2019-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-ad9202a39c304d7fae6d01fc68b6ea172022-12-22T01:36:09ZengMDPI AGMetals2075-47012019-12-011015810.3390/met10010058met10010058History Reduction by Lumping for Time-Efficient Simulation of Additive ManufacturingAndreas Malmelöv0Andreas Lundbäck1Lars-Erik Lindgren2Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, SwedenDepartment of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, SwedenDepartment of Engineering Sciences and Mathematics, Luleå University of Technology, 97187 Luleå, SwedenAdditive manufacturing is the process by which material is added layer by layer. In most cases, many layers are added, and the passes are lengthy relative to their thicknesses and widths. This makes finite element simulations of the process computationally demanding owing to the short time steps and large number of elements. The classical lumping approach in computational welding mechanics, popular in the 80s, is therefore, of renewed interest and is evaluated in this work. The method of lumping means that welds are merged. This allows fewer time steps and a coarser mesh. It was found that the computation time can be reduced considerably, with retained accuracy for the resulting temperatures and deformations. The residual stresses become, to a certain degree, smaller. The simulations were validated against a directed energy deposition (DED) experiment with alloy 625.https://www.mdpi.com/2075-4701/10/1/58finite elementthermo-mechanical analysisadditive manufacturingalloy 625 |
| spellingShingle | Andreas Malmelöv Andreas Lundbäck Lars-Erik Lindgren History Reduction by Lumping for Time-Efficient Simulation of Additive Manufacturing Metals finite element thermo-mechanical analysis additive manufacturing alloy 625 |
| title | History Reduction by Lumping for Time-Efficient Simulation of Additive Manufacturing |
| title_full | History Reduction by Lumping for Time-Efficient Simulation of Additive Manufacturing |
| title_fullStr | History Reduction by Lumping for Time-Efficient Simulation of Additive Manufacturing |
| title_full_unstemmed | History Reduction by Lumping for Time-Efficient Simulation of Additive Manufacturing |
| title_short | History Reduction by Lumping for Time-Efficient Simulation of Additive Manufacturing |
| title_sort | history reduction by lumping for time efficient simulation of additive manufacturing |
| topic | finite element thermo-mechanical analysis additive manufacturing alloy 625 |
| url | https://www.mdpi.com/2075-4701/10/1/58 |
| work_keys_str_mv | AT andreasmalmelov historyreductionbylumpingfortimeefficientsimulationofadditivemanufacturing AT andreaslundback historyreductionbylumpingfortimeefficientsimulationofadditivemanufacturing AT larseriklindgren historyreductionbylumpingfortimeefficientsimulationofadditivemanufacturing |