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Fatigue analysis of a welded component based on different methods
KTH, Superseded Departments, Aeronautical and Vehicle Engineering. Volvo Articulated Haulers AB, Sweden .
2004 (English)In: Welding Research Abroad, ISSN 0043-2318, Vol. 50, no 3, 1-11 p.Article in journal (Refereed) Published
Abstract [en]

This study is part of a project regarding the accuracy of life predictions based on finite element analyses and four different fatigue design methods. Different fatigue design codes, such as nominal stress, geometrical stress, notch stress and linear elastic fracture mechanics are compared regarding work effort and analysis accuracy. The paper also describes the process of developing and verifying a finite element (FE) model as well as other practical work such as load data acquisition, static strain measurements and full-scale fatigue tests under spectrum loading. The component that was used was a stay from an articulated hauler, The results from the fatigue tests showed that all cracks started from relatively large root defects and that a large scatter of the weld dimensions can be expected when the welds are manually performed. The comparison between the different fatigue design codes showed a large scatter in the estimated fatigue life. The verification of the FE-model showed some interesting and in some cases unexpected results. The non-linear force-strain behaviour close to the weld toe was not expected and caused a large amount of work with the FE-mode. Since also the manufacturing tolerances were shown to influence the measurements, the verification of the FE-model became quite hard to accomplish. The influence of different parameters such as weld geometry, defects, misalignments, pre-tension forces and installation accuracy of the gauges should be studied further.

Place, publisher, year, edition, pages
2004. Vol. 50, no 3, 1-11 p.
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-8795Scopus ID: 2-s2.0-1842680973OAI: oai:DiVA.org:kth-8795DiVA: diva2:14225
Note

Updated from "Accepted" to "Published". QC 20150702

Available from: 2005-11-22 Created: 2005-11-22 Last updated: 2015-07-02Bibliographically approved
In thesis
1. Fatigue assessment of welded structures with non-linear boundary conditions
Open this publication in new window or tab >>Fatigue assessment of welded structures with non-linear boundary conditions
2004 (English)Licentiate thesis, comprehensive summary (Other scientific)
Series
TRITA-AVE, ISSN 1651-7660 ; 2004:50
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-497 (URN)91-7283-948-1 (ISBN)
Available from: 2005-11-22 Created: 2005-11-22 Last updated: 2016-11-24

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CiteExportLink to record
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  • apa
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