Fracture Analysis of Ductile Materials by Means of Recent Fracture Theory (MN-r_p -σ_θ)

El-Sheikhy, Refat; Naka, Masaaki

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タイトル	Fracture Analysis of Ductile Materials by Means of Recent Fracture Theory (MN-r_p -σ_θ)
著者	El-Sheikhy, Refat El-Sheikhy, Refat
著者	Naka, Masaaki Naka, Masaaki
著者 (ヨミ)	ナカ, マサアキ
キーワード等	Ductile material
	Fracture
	Fracture Theory
	Cracking mechanism
	Failure analysis
抄録	The current theory is based on the original version of (MN – r_p σ_θ) theory for brittle and quasi-brittle materials. It was developed with Linear Elastic Fracture Mechanics LEFM to study the cracking in the elastic stage for non ductile materials and materials with low ductility. In this research a new of the theory version for the fracture of pure ductile materials and fracture in brittle – ductile transition for semi brittle semi ductile materials is proposed. This new proposed theory for ductile fracture is called the DMN-ductile theory. It has a new concept and a new mechanism. It proposed that the fracture direction can be predicted in the elastic stage in LEFM where the critical fracture load will include two parts one from the elastic stage and the other part from the plastic stage. The fracture load would be determined with Elastic – Plastic Fracture Mechanics EPFM. The direction of the fracture will be in LEFM in the beginning of the propagation and will extend in the same direction in the plastic stage for the same fracture increment, but it may change in the nest fracture problems. In addition, it unifies all views of researches on ductile fracture energy approach. It could introduce a new concept for the ductile fracture process for dealing with any crack and for predicting any required fracture aspect.
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	34
号	2
開始ページ	81
終了ページ	89
刊行年月	2005-12
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/4478
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.34 No.2 (2005-12)

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.34(2) P.81-P.89
DC.title	Fracture Analysis of Ductile Materials by Means of Recent Fracture Theory (MN-r_p -σ_θ)
DC.creator	El-Sheikhy, Refat
DC.creator	Naka, Masaaki
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	2005-12
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/4478
DC.subject	Ductile material
	Fracture
	Fracture Theory
	Cracking mechanism
	Failure analysis
DCTERMS.abstract	The current theory is based on the original version of (MN – r_p σ_θ) theory for brittle and quasi-brittle materials. It was developed with Linear Elastic Fracture Mechanics LEFM to study the cracking in the elastic stage for non ductile materials and materials with low ductility. In this research a new of the theory version for the fracture of pure ductile materials and fracture in brittle – ductile transition for semi brittle semi ductile materials is proposed. This new proposed theory for ductile fracture is called the DMN-ductile theory. It has a new concept and a new mechanism. It proposed that the fracture direction can be predicted in the elastic stage in LEFM where the critical fracture load will include two parts one from the elastic stage and the other part from the plastic stage. The fracture load would be determined with Elastic – Plastic Fracture Mechanics EPFM. The direction of the fracture will be in LEFM in the beginning of the propagation and will extend in the same direction in the plastic stage for the same fracture increment, but it may change in the nest fracture problems. In addition, it unifies all views of researches on ductile fracture energy approach. It could introduce a new concept for the ductile fracture process for dealing with any crack and for predicting any required fracture aspect.
citation_title	Fracture Analysis of Ductile Materials by Means of Recent Fracture Theory (MN-r_p -σ_θ)
citation_author	El-Sheikhy, Refat
citation_author	Naka, Masaaki
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2005-12
citation_journal_title	Transactions of JWRI
citation_volume	34
citation_issue	2
citation_firstpage	81
citation_lastpage	89
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/4478
citation_keywords	Ductile material
	Fracture
	Fracture Theory
	Cracking mechanism
	Failure analysis

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