Fatigue Life Enhancement of Fillet and Butt Welded Joints after Laser Peening

Sakino, Yoshihiro; Sano, Yuji; Sumiya, Rie; Kim, You-Chul

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タイトル	Fatigue Life Enhancement of Fillet and Butt Welded Joints after Laser Peening
著者	Sakino, Yoshihiro Sakino, Yoshihiro
	Sano, Yuji Sano, Yuji
	Sumiya, Rie Sumiya, Rie
	Kim, You-Chul 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.
公開者	大阪大学接合科学研究所
公開者の別表記	Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)	オオサカダイガクセツゴウカガクケンキュウジョ
掲載誌名	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
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/23163
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.41 No.1 (2012-06)

著者版フラグ	publisher
NII資源タイプ	紀要論文
ローカル資源タイプ	紀要論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Transactions of JWRI.41(1) P.71-P.76
DC.title	Fatigue Life Enhancement of Fillet and Butt Welded Joints after Laser Peening
DC.creator	Sakino, Yoshihiro
	Sano, Yuji
	Sumiya, Rie
	Kim, You-Chul
DC.publisher	大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2012-06
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/23163
DC.subject	Laser peening
	Fatigue life
	Residual stress
	Fillet weld
	Butt weld
	Steen for structures
DCTERMS.abstract	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.
citation_title	Fatigue Life Enhancement of Fillet and Butt Welded Joints after Laser Peening
citation_author	Sakino, Yoshihiro
	Sano, Yuji
	Sumiya, Rie
	Kim, You-Chul
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2012-06
citation_journal_title	Transactions of JWRI
citation_volume	41
citation_issue	1
citation_firstpage	71
citation_lastpage	76
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/23163
citation_keywords	Laser peening
	Fatigue life
	Residual stress
	Fillet weld
	Butt weld
	Steen for structures

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