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

✍ Scribed by C. Morgenstern; C.M. Sonsino; A. Hobbacher; F. Sorbo

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 918 KB
• Volume: 28
• Category: Article
• ISSN: 0142-1123
• DOI: 10.1016/j.ijfatigue.2005.10.006

✦ Synopsis

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 Z1.0 mm can be applied to aluminium welded joints from plates with thickness tR5 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. RZK1, 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 DsZ70 MPa as FAT-value for the IIW-fatigue design recommendations.