Cristin-resultat-ID: 2016245
Sist endret: 16. juni 2022, 13:05
NVI-rapporteringsår: 2022
Resultat
Vitenskapelig artikkel
2022

Testing and modelling of butt-welded connections in thin-walled aluminium structures

Bidragsytere:
  • Nguyen-Hieu Hoang
  • David Morin og
  • Magnus Langseth

Tidsskrift

Thin-walled structures
ISSN 0263-8231
e-ISSN 1879-3223
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Volum: 171
Artikkelnummer: 108681
Open Access

Importkilder

Scopus-ID: 2-s2.0-85120712882

Beskrivelse Beskrivelse

Tittel

Testing and modelling of butt-welded connections in thin-walled aluminium structures

Sammendrag

The present paper experimentally investigated the mechanical behaviour of butt-welded joints and evaluated suitable numerical approaches for modelling them in thin-walled structures with large shell-based models. Welded connections of both similar and dissimilar materials were first experimentally investigated. Two extruded plates in 6060 and 7003 in temper T6 were used as parent materials for Metal Inert Gas (MIG) welding. Three welded joints were made by combining the two parent materials. Extensive testing was carried out to investigate microstructure, hardness and mechanical stress–strain behaviour of the base materials, heat-affected zones (HAZ) and weld metals. Cross-weld tensile tests with two weld orientations (with respect to the loading direction) were performed to study the load–displacement and fracture behaviour of the welded joints. The experimental results were also used to provide inputs to calibrate and validate shell element-based models simulating the response of welded aluminium structures. Two modelling approaches were investigated. The first approach, which is a conventional “mechanical analysis”, used material model inputs from the experimental testing, assuming uniform HAZ strength. The second modelling approach, which is proposed in this study for engineering applications, relies on inverse modelling of the load–displacement behaviour of similar material cross-weld tension tests to optimize the HAZ and weld properties. The newly proposed modelling approach was further verified based on a set of verification tests of cross-weld tension, using shell-based models with different mesh sizes. A good agreement between numerical and experimental results both in terms of load–displacement and fracture behaviour was obtained, suggesting that the novel modelling approach could be a reliable and efficient method for designing butt-welded aluminium structures.

Bidragsytere

Nguyen-Hieu Hoang

  • Tilknyttet:
    Forfatter
    ved Materialer og nanoteknologi ved SINTEF AS
  • Tilknyttet:
    Forfatter
    ved Institutt for konstruksjonsteknikk ved Norges teknisk-naturvitenskapelige universitet

David Didier Morin

Bidragsyterens navn vises på dette resultatet som David Morin
  • Tilknyttet:
    Forfatter
    ved Institutt for konstruksjonsteknikk ved Norges teknisk-naturvitenskapelige universitet

Magnus Langseth

  • Tilknyttet:
    Forfatter
    ved Institutt for konstruksjonsteknikk ved Norges teknisk-naturvitenskapelige universitet
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