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論文情報
タイトル
An Investigation for Introducing Welding Imperfection in Elastic-plastic Large Deformation Analysis
著者
Park, Do-Hyun
Park, Do-Hyun
Hirohata, Mikihito
Hirohata, Mikihito
Kim, You-Chul
Kim, You-Chul
著者 (ヨミ)
ヒロハタ, ミキヒト
キーワード等
Welding imperfection
Elastic-plastic large deformation analysis
Thermal elastic-plastic analysis
Welding distortion
Residual stress
抄録
When the elastic-plastic finite displacement analysis based on the large deformation theory is carried out for evaluating elastic-plastic mechanical behavior and ultimate strength of a welded steel structural member, the welding imperfection is indispensably considered and introduced as the initial imperfection. However, it is known that the introduced welding imperfection could not be reproduced with fidelity by unbalanced force because the welding imperfection is not legitimate. Therefore, it is anticipated that the welding imperfection can be introduced with fidelity if the legitimate welding imperfection is obtained. In order to investigate the validity of the anticipation, the thermal elastic-plastic analysis for a single-pass butt-welding was carried out and welding distortion and residual stress as the legitimate welding imperfection were obtained in this study. The obtained welding imperfection was introduced into the elastic-plastic finite displacement analysis as the legitimate initial imperfection and it was verified whether the introduced welding imperfection could be reproduced with high accuracy or not. As a result, the introduced welding distortion was changed largely from original value because thin steel plate is easy to bend. Consequently, it was considered that the introduction accuracy of the welding imperfection is dependent on the flexural rigidity of steel plate. Anyway, it is known that there are such case as the introduction accuracy of the welding imperfection falls down when the welding imperfection obtained from the thermal elastic-plastic analysis based on the infinitesimal deformation theory is introduced into the elastic-plastic finite displacement analysis based on the large deformation theory.
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
38
号
2
開始ページ
87
終了ページ
93
刊行年月
2009-12
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/3948
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.38 No.2 (2009-12)
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著者版フラグ
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.38(2) P.87-P.93
DC.title
An Investigation for Introducing Welding Imperfection in Elastic-plastic Large Deformation Analysis
DC.creator
Park, Do-Hyun
Hirohata, Mikihito
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
2009-12
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/3948
DC.subject
Welding imperfection
Elastic-plastic large deformation analysis
Thermal elastic-plastic analysis
Welding distortion
Residual stress
DCTERMS.abstract
When the elastic-plastic finite displacement analysis based on the large deformation theory is carried out for evaluating elastic-plastic mechanical behavior and ultimate strength of a welded steel structural member, the welding imperfection is indispensably considered and introduced as the initial imperfection. However, it is known that the introduced welding imperfection could not be reproduced with fidelity by unbalanced force because the welding imperfection is not legitimate. Therefore, it is anticipated that the welding imperfection can be introduced with fidelity if the legitimate welding imperfection is obtained. In order to investigate the validity of the anticipation, the thermal elastic-plastic analysis for a single-pass butt-welding was carried out and welding distortion and residual stress as the legitimate welding imperfection were obtained in this study. The obtained welding imperfection was introduced into the elastic-plastic finite displacement analysis as the legitimate initial imperfection and it was verified whether the introduced welding imperfection could be reproduced with high accuracy or not. As a result, the introduced welding distortion was changed largely from original value because thin steel plate is easy to bend. Consequently, it was considered that the introduction accuracy of the welding imperfection is dependent on the flexural rigidity of steel plate. Anyway, it is known that there are such case as the introduction accuracy of the welding imperfection falls down when the welding imperfection obtained from the thermal elastic-plastic analysis based on the infinitesimal deformation theory is introduced into the elastic-plastic finite displacement analysis based on the large deformation theory.
citation_title
An Investigation for Introducing Welding Imperfection in Elastic-plastic Large Deformation Analysis
citation_author
Park, Do-Hyun
Hirohata, Mikihito
Kim, You-Chul
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2009-12
citation_journal_title
Transactions of JWRI
citation_volume
38
citation_issue
2
citation_firstpage
87
citation_lastpage
93
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/3948
citation_keywords
Welding imperfection
Elastic-plastic large deformation analysis
Thermal elastic-plastic analysis
Welding distortion
Residual stress