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Fatigue life analysis of weld ends: Comparison between testing and FEM-calculations
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 300 HE creditsStudent thesis
Abstract [en]

The thesis examines the fatigue life of weld ends, where very little usable research previously has been conducted, and often the weld ends are the critical parts of the weld. It is essential knowing the fatigue life of welds to be able to use them most efficiently.The report is divided into two parts; in the first the different calculation methods used today at Toyota Material Handling are examined and compared. Based on the results from the analysis and what is used mostly today, the effective notch approach is the method used in part two.To validate the calculation methods and models used, fatigue testing of the welded test specimens was conducted together with a stress test. New modelling methods of the weld ends that coincide with the test results were made in the finite element software Abaqus. A new way of modelling the weld ends for the effective notch method is also proposed. By using a notch radius of 0.2 mm and rounded weld ends the calculated fatigue life better matches the life of the real weld ends.

Place, publisher, year, edition, pages
2014. , 82 p.
Keyword [en]
Weld end, Fatigue, Fatigue Life, Calculation methods, Modelling, FEM, Comparison, Testing, LCF
Keyword [sv]
Svetsslut, Utmattning, Beräkningsmetoder, Provning, Modellering, FEM, Jämförelse
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:liu:diva-108988ISRN: LIU-IEI-TEK-A--14/02012--SEOAI: oai:DiVA.org:liu-108988DiVA: diva2:734520
External cooperation
Toyota Material Handling
Subject / course
Solid Mechanics
Supervisors
Examiners
Available from: 2014-08-04 Created: 2014-07-17 Last updated: 2014-08-18Bibliographically approved

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf