Development of Dynamic Mesh Refining Method for Large Scale Thermal and Mechanical Analysis in Welding and Line Heating

Huang, Hui; Murakawa, Hidekazu

doi:https://doi.org/10.18910/26595

Development of Dynamic Mesh Refining Method for Large Scale Thermal and Mechanical Analysis in Welding and Line Heating

Huang, Hui; Murakawa, Hidekazu

Transactions of JWRI, 2013, 42(1), 63-70

アクセス数:190件（2025-05-23 08:24 集計）

固定URL: https://doi.org/10.18910/26595

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タイトル	Development of Dynamic Mesh Refining Method for Large Scale Thermal and Mechanical Analysis in Welding and Line Heating
著者	著者名 Huang, Hui
著者	NRID 1000060166270 1000060166270 著者名 Murakawa, Hidekazu
キーワード等	Welding
	Line heating
	Thermal elastic-plastic FEM
	Dynamic mesh refining method
	Background mesh
	Computation efficiency
抄録	Simulation for real scale such as automobile and airplane is now gradually being achieved with the aid of computer technology, which can predict the behaviors concerned practically. For welding or heating problems, thermal elastic-plastic FEM has shown its wonderful capability of computing welding distortion and residual stress. In the recent years, many efforts have been made to improve the performance of simulation on large scale structures in aspects of thermal mechanics and computer science. In this paper, we introduced a new method-dynamic mesh refining method (DMRM) which can ensure the accuracy for stress and strain while reducing large amounts of computational time. A background mesh with fine elements in the vicinity of welds or heating lines is designed to update solutions if necessary. Combined mesh for computation has fine elements only near the current welding or heating position. The element connectivity on interfaces between coarse element and fine element is realized by a transformation matrix based on interpolation function. The model is dynamically refined with movement of the heat source. Several numerical examples demonstrated the accuracy and efficeincy of proposed method, and a model consisting of over 2 million elements has been accomplished in 66 hours.
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)	42(1)
ページ	63-70
刊行年月	2013-06
言語	英語
ハンドルURL	https://hdl.handle.net/11094/26595
DOI	https://doi.org/10.18910/26595
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.42 No.1 (2013-06)

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. 2013, 42(1), p. 63-70
DC.title	Development of Dynamic Mesh Refining Method for Large Scale Thermal and Mechanical Analysis in Welding and Line Heating
DC.creator	Huang, Hui
DC.creator	Murakawa, Hidekazu
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	2013-06
DC.subject	Welding
	Line heating
	Thermal elastic-plastic FEM
	Dynamic mesh refining method
	Background mesh
	Computation efficiency
DCTERMS.abstract	Simulation for real scale such as automobile and airplane is now gradually being achieved with the aid of computer technology, which can predict the behaviors concerned practically. For welding or heating problems, thermal elastic-plastic FEM has shown its wonderful capability of computing welding distortion and residual stress. In the recent years, many efforts have been made to improve the performance of simulation on large scale structures in aspects of thermal mechanics and computer science. In this paper, we introduced a new method-dynamic mesh refining method (DMRM) which can ensure the accuracy for stress and strain while reducing large amounts of computational time. A background mesh with fine elements in the vicinity of welds or heating lines is designed to update solutions if necessary. Combined mesh for computation has fine elements only near the current welding or heating position. The element connectivity on interfaces between coarse element and fine element is realized by a transformation matrix based on interpolation function. The model is dynamically refined with movement of the heat source. Several numerical examples demonstrated the accuracy and efficeincy of proposed method, and a model consisting of over 2 million elements has been accomplished in 66 hours.
DC.identifier	10.18910/26595
DC.format	26595
citation_title	Development of Dynamic Mesh Refining Method for Large Scale Thermal and Mechanical Analysis in Welding and Line Heating
citation_author	Huang, Hui
citation_author	Murakawa, Hidekazu
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2013-06
citation_journal_title	Transactions of JWRI
citation_volume	42
citation_issue	1
citation_firstpage	63
citation_lastpage	70
citation_public_url	https://hdl.handle.net/11094/26595
citation_doi_detail	10.18910/26595
citation_doi	https://doi.org/10.18910/26595

Development of Dynamic Mesh Refining Method for Large Scale Thermal and Mechanical Analysis in Welding and Line Heating

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