Application of Self-Reference Lock-in Thermography to the Measurement of Fatigue Damage Parameter

Sakino, Yoshihiro; Sakagami, Takahide; Kim, You-Chu

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タイトル	Application of Self-Reference Lock-in Thermography to the Measurement of Fatigue Damage Parameter
著者	Sakino, Yoshihiro Sakino, Yoshihiro
	Sakagami, Takahide Sakagami, Takahide
	Kim, You-Chu Kim, You-Chu
キーワード等	Fatigue
	Thermography
	Sacrificial test piece
	Bridge maintenance
	Crack growth
抄録	A sacrificial test piece is used as a specimen attached to the member of a main structure to evaluate the damage before the appearance of a crack in a member of a bridge. If the crack length of the sacrificial test piece can be measured from a long distance, the damage in a member of the bridge can be evaluated more easily and cheaply. In this paper, thin steel plates, which have initial cracks at the center, are used as sacrificial test pieces and a measuring method by self-reference lock-in thermography is proposed. Fatigue tests of the sacrificial test pieces were performed and crack lengths were measured by the proposed method from a long distance. As the result, it is ascertained that the crack length of the sacrificial test piece can be measured from a long distance by the proposed method in the case that the stress range is 30MPa or more, even if the frequency is as small as 3Hz.
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	37
号	2
開始ページ	81
終了ページ	86
刊行年月	2008-12
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/10914
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.37 No.2 (2008-12)

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.37(2) P.81-P.86
DC.title	Application of Self-Reference Lock-in Thermography to the Measurement of Fatigue Damage Parameter
DC.creator	Sakino, Yoshihiro
	Sakagami, Takahide
	Kim, You-Chu
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	2008-12
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/10914
DC.subject	Fatigue
	Thermography
	Sacrificial test piece
	Bridge maintenance
	Crack growth
DCTERMS.abstract	A sacrificial test piece is used as a specimen attached to the member of a main structure to evaluate the damage before the appearance of a crack in a member of a bridge. If the crack length of the sacrificial test piece can be measured from a long distance, the damage in a member of the bridge can be evaluated more easily and cheaply. In this paper, thin steel plates, which have initial cracks at the center, are used as sacrificial test pieces and a measuring method by self-reference lock-in thermography is proposed. Fatigue tests of the sacrificial test pieces were performed and crack lengths were measured by the proposed method from a long distance. As the result, it is ascertained that the crack length of the sacrificial test piece can be measured from a long distance by the proposed method in the case that the stress range is 30MPa or more, even if the frequency is as small as 3Hz.
citation_title	Application of Self-Reference Lock-in Thermography to the Measurement of Fatigue Damage Parameter
citation_author	Sakino, Yoshihiro
	Sakagami, Takahide
	Kim, You-Chu
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2008-12
citation_journal_title	Transactions of JWRI
citation_volume	37
citation_issue	2
citation_firstpage	81
citation_lastpage	86
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/10914
citation_keywords	Fatigue
	Thermography
	Sacrificial test piece
	Bridge maintenance
	Crack growth

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