Fatigue strength modelling of high-performing welded joints

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • University of British Columbia

Abstract

This paper investigates the fatigue strength modelling of high-performing welded steel joints. The work considers the strain-based, notch stress, averaged strain energy density approaches, and linear elastic fracture mechanics. A comparison of the methods with experimental data shows that the predictions vary significantly for different modelling assumptions. Only the microstructure-sensitive strain-based approach can predict the fatigue life of various weld geometries and plate thicknesses. The explicit modelling of the localised plasticity using the microstructure-dependent representative volume element is required for accurate prediction of the short crack initiation and growth periods, which dominate the fatigue life modelling of high-performing welds.

Details

Original languageEnglish
Article number105555
JournalINTERNATIONAL JOURNAL OF FATIGUE
Volume135
Publication statusPublished - Jun 2020
MoE publication typeA1 Journal article-refereed

    Research areas

  • Fatigue strength, Welded joint, Strain-based approach, Notch stress approach, Strain energy density

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