An Investigation for Introducing Welding Imperfection in Elastic-plastic Large Deformation Analysis

Park, Do-Hyun; Hirohata, Mikihito; Kim, You-Chul

Transactions of JWRI, 2009, 38(2), 87-93

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Identifier to cite or link to this item: https://doi.org/10.18910/3948

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Title
An Investigation for Introducing Welding Imperfection in Elastic-plastic Large Deformation Analysis
Creator
CreatorName
Park, Do-Hyun
NRID
1000050565140 1000050565140
ORCID
0000-0003-4013-7960 0000-0003-4013-7960
researchmap permalink
m_hirohata m_hirohata
Scopus Author ID
7006219862 7006219862
CreatorName
Hirohata, Mikihito ; ヒロハタ, ミキヒト
NRID
1000020144529 1000020144529
CreatorName
Kim, You-Chul
Subject
Welding imperfection
Elastic-plastic large deformation analysis
Thermal elastic-plastic analysis
Welding distortion
Residual stress
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.
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
Source Title
Transactions of JWRI
Volume (Issue)
38(2)
Page
87-93
Date of Issued
2009-12
Language
English
Handle URL
https://hdl.handle.net/11094/3948
DOI
https://doi.org/10.18910/3948
PISSN
03874508
NCID
AA00867058
Access Rights
open access
oaire:version
Version of Record
Category
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.38 No.2 (2009-12)