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Experiments and efficient simulations of distortions of laser beam-welded thin-sheet close beam steel structures
KTH, School of Industrial Engineering and Management (ITM), Production Engineering. KTH, Centres, XPRES, Excellence in production research.ORCID iD: 0000-0002-9849-1754
Univ West, Dept Engn Sci, Trollhättan, Sweden.;Swerea KIMAB, Stockholm, Sweden..
KTH, Centres, XPRES, Excellence in production research. KTH, School of Industrial Engineering and Management (ITM), Production Engineering. Swerea KIMAB, Stockholm, Sweden..ORCID iD: 0000-0002-6061-662X
2019 (English)In: Proceedings of the Institution of mechanical engineers. Part B, journal of engineering manufacture, ISSN 0954-4054, E-ISSN 2041-2975, Vol. 233, no 3, p. 787-796Article in journal (Refereed) Published
Abstract [en]

In this article, geometrical distortions of steel structures due to laser beam welding were analyzed. Two 700-mm-long U-beam structures were welded in overlap configurations: a double U-beam structure and a U-beam/flat structure. The structures were in different material combinations from mild steel to ultrahigh-strength steel welded with different process parameters. Different measures of distortions of the U-beam structures were evaluated after cooling. Significant factors of the welding process and the geometry of the structures were identified. Furthermore, welding distortions were modeled using two predictive finite element simulation models. The previously known shrinkage method and a newly developed time-efficient simulation method were evaluated. The new model describes the effects of expansion and shrinkage of the weld zone during welding and material plasticity at elevated temperatures. The new simulation method has reasonable computation times for industrial applications and improved agreement with experiments compared to the often used so-called shrinkage method.

Place, publisher, year, edition, pages
SAGE PUBLICATIONS LTD , 2019. Vol. 233, no 3, p. 787-796
Keywords [en]
Laser beam welding, distortions, finite element simulations, ultrahigh-strength steel, thin-sheet structures
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
URN: urn:nbn:se:kth:diva-243934DOI: 10.1177/0954405417749625ISI: 000456544300010Scopus ID: 2-s2.0-85045056604OAI: oai:DiVA.org:kth-243934DiVA, id: diva2:1296035
Note

QC 20190313

Available from: 2019-03-13 Created: 2019-03-13 Last updated: 2019-03-13Bibliographically approved

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Andersson, OscarMelander, Arne

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Production EngineeringXPRES, Excellence in production research
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Production Engineering, Human Work Science and Ergonomics

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