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jwri41_01-071 pdf 338 KB 92 2012.11.16

論文情報

タイトル
Fatigue Life Enhancement of Fillet and Butt Welded Joints after Laser Peening
著者
NRID
1000080273712 1000080273712
著者名
Sakino, Yoshihiro
NRID
1000010035058 1000010035058
著者名
Sano, Yuji
著者名
Sumiya, Rie
NRID
1000020144529 1000020144529
著者名
Kim, You-Chul
キーワード等
Laser peening
Fatigue life
Residual stress
Fillet weld
Butt weld
Steen for structures
抄録
Laser peening which introduces compressive residual stresses on surfaces is effective in enhancing fatigue lives of welded components, because tensile residual stress due to welding is one of the most prominent factors reducing the fatigue lives. Structural steels are widely used for bridges, buildings, etc; however, the effects of laser peening on the structural steels are not well established, especially on the welded zones. In this study, the welded zones of a box-welded joint were treated by laser peening and the residual stress was examined. Moreover, fatigue lives were evaluated for box-welded joints and butt welded joints with and without laser peening. Results obtained are summarized as follows: (1) Laser peening resulted in a change in the residual stress from tensile to compressive around box welding zones of a fillet welded rib-plate. (2) Laser peening can dramatically extend the fatigue lives and increase the fatigue strength of fillet and butt welded joints.
出版者
大阪大学接合科学研究所
Joining and Welding Research Institute, Osaka University
オオサカ ダイガク セツゴウ カガク ケンキュウジョ
収録物名
Transactions of JWRI
巻
41
号
1
開始ページ
71
終了ページ
76
刊行年月
2012-06
言語
英語
ハンドルURL
https://hdl.handle.net/11094/23163
ISSN
03874508
NCID
AA00867058
アクセス権
open access
出版タイプ
Version of Record
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.41 No.1 (2012-06)