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

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

doi:https://doi.org/10.18910/10914

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

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

Transactions of JWRI, 2008, 37(2), 81-86

アクセス数:279件（2025-07-01 11:00 集計）

固定URL: https://doi.org/10.18910/10914

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タイトル	Application of Self-Reference Lock-in Thermography to the Measurement of Fatigue Damage Parameter
著者	NRID 1000080273712 1000080273712 著者名 Sakino, Yoshihiro
	NRID 1000050192589 1000050192589 著者名 Sakagami, Takahide
	NRID 1000020144529 1000020144529 著者名 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.
出版者	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
収録物名	Transactions of JWRI
巻(号)	37(2)
ページ	81-86
刊行年月	2008-12
言語	英語
ハンドルURL	https://hdl.handle.net/11094/10914
DOI	https://doi.org/10.18910/10914
PISSN	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
カテゴリ	Transactions of JWRI / Vol.37 No.2 (2008-12)

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. 2008, 37(2), p. 81-86
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
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2008-12
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.
DC.identifier	10.18910/10914
DC.format	10914
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_public_url	https://hdl.handle.net/11094/10914
citation_doi_detail	10.18910/10914
citation_doi	https://doi.org/10.18910/10914

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

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