Influence of non-linear effects on fatigue assessment of a welded structure
2006 (English)In: Steel Research International, ISSN 1611-3683, Vol. 77, no 12, 866-872 p.Article in journal (Refereed) Published
In this paper root cracks in a welded structure are investigated using the effective notch stress approach and Linear Elastic Fracture Mechanics (LEFM). The problem is complicated by the fact that the welds subjected to endurance stress are located close to a screw joint. The Finite Element (FE) model used for evaluating the fatigue life includes both this screw joint as well as adjacent components and the contact behaviour between the structures. Several important problems in the evaluation of stress intensity factors and notch stresses are investigated. The results can give useful information in the work of performing a fatigue analysis. The areas examined are the significance of the load direction, mesh density, the importance of the right global stiffness in the model, the crack deflection angle and the modelling of a root notch versus the requirements on the drawing.
Place, publisher, year, edition, pages
2006. Vol. 77, no 12, 866-872 p.
fatigue, welded structure, weld root, LEFM, notch stress, mesh grid, load direction, model stiffness
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-8796ISI: 000243162500004OAI: oai:DiVA.org:kth-8796DiVA: diva2:14226
QC 20111219 Updated from Accepted to Published 2005-11-222005-11-222011-12-19Bibliographically approved