A study on improvement of fatigue performance by shot blasted surface treatment

Toshihiro Fujii, Koji Gotoh, Junichi Deguchi, Koji Murakami

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Recently, the strength of the hull structure including fatigue strength has seen significant improvement because of application of IACS CSR (Common Structure rule), developed by IACS. Various methods which can increase the fatigue strength at welded joints are suggested, since the damage morphology on the recently welded structures was observed to be primarily fatigue failure. In Shipbuilding industry, smoothening of the welding bead toe by grinding is the method that is customarily adopted in order to increase fatigue strength. And recently, peening treatment at the welding bead has also been adopted. The peening treatment can reduce stress concentration by smoothening of the welding bead toe, and a compressive residual stress field generated by the impact of peening. In case of generating compressive residual stress by impact, the same effect could be expected by shot blasting, which is the steel surface treatment before painting. In this study, the condition of the residual stress generated at welding toe by shot blasting was investigated, and then from results of the fatigue test, the increase in fatigue strength due to residual stress is verified.

本文言語英語
ホスト出版物のタイトルMaterials Technology
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791858790
DOI
出版ステータス出版済み - 1 1 2019
イベントASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, 英国
継続期間: 6 9 20196 14 2019

出版物シリーズ

名前Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
4

会議

会議ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
Country英国
CityGlasgow
Period6/9/196/14/19

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

フィンガープリント 「A study on improvement of fatigue performance by shot blasted surface treatment」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル