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Improvement of Extremely Low Cycle Fatigue Strength of Welded Joints by Toe Finishing

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Abstract

The improvement of extremely low cycle fatigue strength of welded joints by TIG dressing and burr grinding was investigated. The weld toes of T-shape welded joints were improved by TIG dressing or burr grinding and tested under displacement control conditions. The crack initiation life of finished specimens was at least threefold longer than that of as-welded specimens. There was no clear difference in improvement between TIG dressing and burr grinding. We also analysed the local strain around the cracking point by finite element analysis and performed local strain-based fatigue assessment. The results indicated that extremely low cycle fatigue strength of the joints improved by TIG dressing and burr grinding can be assessed by evaluating the local strain and referring to the extremely low cycle fatigue strength curve.

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References

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Authors and Affiliations

  1. EcoTopia Science Institute, Nagoya University, Nagoya, Japan

    Kazuo Tateishi

  2. Department of Civil Engineering, Tokyo Institute of Technology, Tokyo, Japan

    Takeshi Hanji Post-Doctoral Research Fellow

  3. Department of Civil Engineering, Nagoya University, Nagoya, Japan

    Shuji Hanibuchi (Master’s Degree student)

Authors
  1. Kazuo Tateishi
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  2. Takeshi Hanji Post-Doctoral Research Fellow
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  3. Shuji Hanibuchi
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Correspondence to Kazuo Tateishi.

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Tateishi, K., Hanji, T. & Hanibuchi, S. Improvement of Extremely Low Cycle Fatigue Strength of Welded Joints by Toe Finishing. Weld World 53, R238–R245 (2009). https://doi.org/10.1007/BF03321135

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  • DOI: https://doi.org/10.1007/BF03321135

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