Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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
Effect of material grade on fatigue strength and residual stresses in high strength steel welds
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis work is concerned with effect of material grade on fatigue strength of welded joints. Fatigue strength evaluation of welded joints in as welded and post weld treated condition was carried out with effective notch method. Results of peak stress method have also been compared with those of effective notch method for as welded joints. In addition, using the results of effective notch method, the effect of important weld and global geometry factors on notch stress concentration factor has been studied with 2-level design of experiment and a mathematical relation among stress concentration factor and the geometric factors has been proposed. Overall, thickness of the base plate and toe radius is found to be the most important factors determining fatigue strength of the joint.

Welding induced residual stresses have also been predicted using 2D and 3D FEM analysis to see their effect on fatigue strength of the joints. Also, transversal residual stresses were measured using X-ray diffraction method to assess the accuracy of predicted results. Based on simulation results, effect of geometric factors on maximum value of transversal residual stress was also investigated.

Place, publisher, year, edition, pages
2012. , 33 p.
Series
Trita-AVE, ISSN 1651-7660 ; 2012: 38
Keyword [en]
Fatigue Strength, Fillet Welded Joints, Effective Notch Method, Residual Stress Simulation.
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-101928OAI: oai:DiVA.org:kth-101928DiVA: diva2:549888
Subject / course
Lightweight Structures
Uppsok
Technology
Supervisors
Available from: 2012-09-10 Created: 2012-09-05 Last updated: 2012-09-10Bibliographically approved

Open Access in DiVA

fulltext(8119 kB)4468 downloads
File information
File name FULLTEXT01.pdfFile size 8119 kBChecksum SHA-512
5b695a40e51eb0ed86b8b85aee11869ce76869d219b12d15481f8e841ab76fffec7f93cefe891177aa20450cb31ad7d2ac67687ed743f46ba663ee25bd76b0e3
Type fulltextMimetype application/pdf

By organisation
Lightweight Structures
Other Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 4468 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 554 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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