A review of multiaxial fatigue of weldments: experimental results, design code and critical plane approaches

M Backstrom*, G Marquis

*Corresponding author for this work

Research output: Contribution to journalLiterature reviewScientificpeer-review

Abstract

A survey of biaxial (bending or tension and torsion) constant amplitude fatigue of welded connections is presented. Re-analysis of 233 experimental results from eight different studies has been performed based on hot spot stresses and three potential damage parameters: maximum principal stress range; maximum shear stress range; and a modified critical plane model for welds. Of the three methods, the critical plane model was most successful in resolving the data to a single S-N line. The design curve for all toe failures based on the critical plane model was FAT 97 with a slope of 3. By excluding butt welds and including only fillet welds that failed at the weld toe, the design curve was increased to FAT 114 with a slope of 3. However, observed scatter was 70-100% larger than that observed in uniaxial loaded specimens analysed using the hot spot approach.

Original languageEnglish
Pages (from-to)279-291
Number of pages13
JournalFatigue and Fracture of Engineering Materials and Structures
Volume24
Issue number5
DOIs
Publication statusPublished - May 2001
MoE publication typeA1 Journal article-refereed

Keywords

  • biaxial fatigue
  • multiaxial fatigue
  • fatigue of welds
  • WELDED-JOINTS
  • STRENGTH
  • STRESS

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