Fatigue design of aluminium welded joints by the local stress concept with the fictitious notch radius of r<sub>f</sub>=1 mm: Fid-Bau Portal

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Fatigue design of aluminium welded joints by the local stress concept with the fictitious notch radius of r_f=1 mm

Morgenstern, C. / Sonsino, C.M. / Hobbacher, A. / Sorbo, F.

The investigations were carried out with three different types of MIG-welded joints of the two aluminium alloys AlMg4.5Mn (AW-5083) and AlMgSi1 T6 (AW-6082 T6) under fully reversed and pulsating axial loading. The evaluation of the results showed that the local stress concept using the fictitious notch radius of r_f=1.0 mm can be applied to aluminium welded joints from plates with thickness t >=5 mm independently from the alloy and weld geometries (fully or partially penetrated butt welds, transversal stiffener). Master design curves are proposed for different stress ratios, i.e. R=-1, 0 and 0.5, which allow the consideration of residual stresses as well as load induced mean stresses. The results permit also the suggestion of Delta sigma=70 MPa as FAT-value for the IIW-fatigue design recommendations.

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Fatigue design of aluminium welded joints by the local stress concept with the fictitious notch radius of r_f=1 mm

Morgenstern, C. / Sonsino, C.M. / Hobbacher, A. / Sorbo, F.

The investigations were carried out with three different types of MIG-welded joints of the two aluminium alloys AlMg4.5Mn (AW-5083) and AlMgSi1 T6 (AW-6082 T6) under fully reversed and pulsating axial loading. The evaluation of the results showed that the local stress concept using the fictitious notch radius of r_f=1.0 mm can be applied to aluminium welded joints from plates with thickness t >=5 mm independently from the alloy and weld geometries (fully or partially penetrated butt welds, transversal stiffener). Master design curves are proposed for different stress ratios, i.e. R=-1, 0 and 0.5, which allow the consideration of residual stresses as well as load induced mean stresses. The results permit also the suggestion of Delta sigma=70 MPa as FAT-value for the IIW-fatigue design recommendations.

Fatigue design of aluminium welded joints by the local stress concept with the fictitious notch radius of r_f=1 mm

Morgenstern, C. / Sonsino, C.M. / Hobbacher, A. / Sorbo, F.

The investigations were carried out with three different types of MIG-welded joints of the two aluminium alloys AlMg4.5Mn (AW-5083) and AlMgSi1 T6 (AW-6082 T6) under fully reversed and pulsating axial loading. The evaluation of the results showed that the local stress concept using the fictitious notch radius of r_f=1.0 mm can be applied to aluminium welded joints from plates with thickness t >=5 mm independently from the alloy and weld geometries (fully or partially penetrated butt welds, transversal stiffener). Master design curves are proposed for different stress ratios, i.e. R=-1, 0 and 0.5, which allow the consideration of residual stresses as well as load induced mean stresses. The results permit also the suggestion of Delta sigma=70 MPa as FAT-value for the IIW-fatigue design recommendations.

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Title:

Fatigue design of aluminium welded joints by the local stress concept with the fictitious notch radius of r_f=1 mm

Contributors:

Morgenstern, C. (author) / Sonsino, C.M. (author) / Hobbacher, A. (author) / Sorbo, F. (author)

Published in:

International Journal of Fatigue ; 28 ; 881-890

Publication date:

2006

Size:

10 Seiten, 21 Quellen

ISSN:

DOI:

https://doi.org/10.1016/j.ijfatigue.2005.10.006

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Materialermüdung , Aluminiumoxid , Stahl , Spannungsanalyse , Baustatik , Stumpfschweißen , Schweißverbindung , Aluminiummagnesiummanganlegierung , Aluminiummagnesiumsiliciumlegierung , Ermüdungswiderstand

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