Experiments and efficient simulations of distortions of laser beam–welded thin-sheet close beam steel structures

Author:

Andersson Oscar1ORCID,Fahlström Karl23,Melander Arne13

Affiliation:

1. Department of Production Engineering and XPRES, KTH Royal Institute of Technology, Stockholm, Sweden

2. Department of Engineering Science, University West, Trollhättan, Sweden

3. Swerea KIMAB, Stockholm, Sweden

Abstract

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.

Funder

VINNOVA

Publisher

SAGE Publications

Subject

Industrial and Manufacturing Engineering,Mechanical Engineering

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Process parameter selection for laser welding of aluminium alloy from the perspective of energy effectiveness;Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture;2022-03-03

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