International Journal of Steel Structures

, Volume 14, Issue 4, pp 769–776 | Cite as

Effects of ultrasonic peening on fatigue strength of out-of-plane gusset joints

  • Koji KinoshitaEmail author
  • Akito Imamura
  • Yoshihiro Watanabe
  • Mitsuru Handa


Effect of high frequency peening treatment with a small radius tip pin, which is less than 3mm radius tip pin, still remains unclear, although the effect of ultrasonic impact treatment on fatigue strength has been investigated. The objective of this study is to investigate the effect of ultrasonic peening with a 1.5mm radius tip pin on fatigue strength of out-of-plane gusset welded joints. Plate bending fatigue tests of those joints carried out. The results show that the peening can improve fatigue strength, when mean stress does not change or already changes before the peening is carried out. It also shows that the effect of the ultrasonic impact peening become less with increasing mean stress after the ultrasonic peening was carried out, and when the ultrasonic peening is not sufficient for the weld toe.


ultrasonic peening out-of-plane gusset welded joints fatigue tests residual stress 


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Copyright information

© Korean Society of Steel Construction and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Koji Kinoshita
    • 1
    Email author
  • Akito Imamura
    • 2
  • Yoshihiro Watanabe
    • 3
  • Mitsuru Handa
    • 3
  1. 1.Department of Civil EngineeringGifu UniversityGifuJapan
  2. 2.Construction DepartmentMitsui Zosen Steel Structures Engineering Co., LtdChibaJapan
  3. 3.Toyo SeikoAichiJapan

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