Studies on Two Failure Modes and Shear Strength of Various CMT Brazed Lap Joints of Dissimilar Materials

Lin, Jian; Ma, Ninshu; Lei, Yongping; Murakawa, Hidekazu

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タイトル	Studies on Two Failure Modes and Shear Strength of Various CMT Brazed Lap Joints of Dissimilar Materials
著者	Lin, Jian Lin, Jian
	Ma, Ninshu Ma, Ninshu
	Lei, Yongping Lei, Yongping
	Murakawa, Hidekazu Murakawa, Hidekazu
キーワード等	Cold metal transfer
	Steel/Al dissimilar materials joint
	Shear strength
	Failure mode
	Numerical model
抄録	Cold metal transfer (CMT) is a promising method to join steel/Al dissimilar materials together in vehicle body assembly. In this paper, shear strength and failure mode of CMT brazed lap joint of steel/Al dissimilar materials are investigated in detail by both experimental and numerical simulating method. Two failure modes, including interface fracture and fusion line fracture are found out. Failure mode transition and the factors influencing joint strength and failure mode are discussed in detail. Finally, a numerical model to estimate shear strength and failure mode of CMT brazed lap joint of dissimilar materials, is developed based on the failure criteria of interface layer and fusion line fracture. It is shown that the numerical model including interface layer and fusion line failure criteria can be used to predict shear strength and failure mode of CMT brazed lap joint of dissimilar materials. Steel sheet thickness and strength grade can have an obvious effect on joint strength of interface layer fracture because of stress concentration status variation at interface layer element. And joint strength of fusion line fracture can be improved by reducing micro defects in weld metal.
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	WSE2011
開始ページ	105
終了ページ	111
刊行年月	2012-03
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/23070
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Special Issue on Welding science and Engineering (WSE2011)

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.WSE2011 P.105-P.111
DC.title	Studies on Two Failure Modes and Shear Strength of Various CMT Brazed Lap Joints of Dissimilar Materials
DC.creator	Lin, Jian
	Ma, Ninshu
	Lei, Yongping
	Murakawa, Hidekazu
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	2012-03
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/23070
DC.subject	Cold metal transfer
	Steel/Al dissimilar materials joint
	Shear strength
	Failure mode
	Numerical model
DCTERMS.abstract	Cold metal transfer (CMT) is a promising method to join steel/Al dissimilar materials together in vehicle body assembly. In this paper, shear strength and failure mode of CMT brazed lap joint of steel/Al dissimilar materials are investigated in detail by both experimental and numerical simulating method. Two failure modes, including interface fracture and fusion line fracture are found out. Failure mode transition and the factors influencing joint strength and failure mode are discussed in detail. Finally, a numerical model to estimate shear strength and failure mode of CMT brazed lap joint of dissimilar materials, is developed based on the failure criteria of interface layer and fusion line fracture. It is shown that the numerical model including interface layer and fusion line failure criteria can be used to predict shear strength and failure mode of CMT brazed lap joint of dissimilar materials. Steel sheet thickness and strength grade can have an obvious effect on joint strength of interface layer fracture because of stress concentration status variation at interface layer element. And joint strength of fusion line fracture can be improved by reducing micro defects in weld metal.
citation_title	Studies on Two Failure Modes and Shear Strength of Various CMT Brazed Lap Joints of Dissimilar Materials
citation_author	Lin, Jian
	Ma, Ninshu
	Lei, Yongping
	Murakawa, Hidekazu
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2012-03
citation_journal_title	Transactions of JWRI
citation_volume	WSE2011
citation_firstpage	105
citation_lastpage	111
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/23070
citation_keywords	Cold metal transfer
	Steel/Al dissimilar materials joint
	Shear strength
	Failure mode
	Numerical model

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