Fatigue experiment and assessment of butt-welded joints in steel structures considering misalignment and weld geometry effects

Luo, Pengjun; Mashino, Yuta; Matsuo, Yuki et al.

International Journal of Fatigue, 2024, 182, 108200

アクセス数:78件（2025-05-17 14:48 集計）

固定URL: https://hdl.handle.net/11094/94884

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タイトル
Fatigue experiment and assessment of butt-welded joints in steel structures considering misalignment and weld geometry effects
著者
著者名
Luo, Pengjun
著者名
Mashino, Yuta
著者名
Matsuo, Yuki
著者名
Kasaoka, Yuki
NRID
1000070344702 1000070344702
ORCID
0000-0002-9279-0657 0000-0002-9279-0657
researchmap permalink
tsutsumi tsutsumi
Scopus Author ID
7102881459 7102881459
著者名
Tsutsumi, Seiichiro
キーワード等
Butt-welded joint
Fatigue
Misalignment
Stress concentration
Weld geometry
内容
Luo P., Mashino Y., Matsuo Y., et al. Fatigue experiment and assessment of butt-welded joints in steel structures considering misalignment and weld geometry effects. International Journal of Fatigue 182, 108200 (2024); https://doi.org/10.1016/j.ijfatigue.2024.108200.
抄録
This study investigates the fatigue behavior of butt-welded joints considering the effects of misalignments and weld geometries. Fourteen specimens were fabricated with varied assembly root gaps and axial eccentricities, and they were subjected to cyclic tensile loading with constant amplitude. Misalignments (both axial and angular) and weld geometries (including weld toe radius, flank angle, weld reinforcement height, and width) were measured using a 3D optical scanning system and subsequently used for fatigue evaluation in terms of fatigue crack locations and fatigue strength. The fatigue test results indicate a noticeable decrease in nominal stress fatigue strength as the assembled axial eccentricities increase, regardless of the assembled root gaps. However, the correlation between assembled root gaps and fatigue strength is not clear, as a larger assembled root gap corresponds to a flatter weld reinforcement on one hand and an increase in angular misalignment on the other hand. Several stress magnification factor (SMF) and stress concentration factor (SCF) formulae available in the literature are employed to characterize the combined effects of misalignment and weld geometries. The investigation results indicate that misalignments and weld geometries both play critical roles in the fatigue behavior of butt-welded joints. The combination of Remes and Varsta's SCF formula with Luo et al.'s SMF formula is the most recommended method due to its accuracy and robustness regarding the evaluation of both the fatigue crack locations and fatigue life in the investigated butt-welded joints.
出版者
Elsevier Ltd
収録物名
International Journal of Fatigue
巻(号)
182
ページ
108200
刊行年月
2024-05-01
言語
英語
ハンドルURL
https://hdl.handle.net/11094/94884
PISSN
01421123
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1016/j.ijfatigue.2024.108200
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article