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

Number of Access:387（2025-08-13 23:54 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/94884

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Title
Fatigue experiment and assessment of butt-welded joints in steel structures considering misalignment and weld geometry effects
Creator
CreatorName
Luo, Pengjun
CreatorName
Mashino, Yuta
CreatorName
Matsuo, Yuki
CreatorName
Kasaoka, Yuki
NRID
1000070344702 1000070344702
ORCID
0000-0002-9279-0657 0000-0002-9279-0657
researchmap permalink
tsutsumi tsutsumi
Scopus Author ID
7102881459 7102881459
CreatorName
Tsutsumi, Seiichiro
Subject
Butt-welded joint
Fatigue
Misalignment
Stress concentration
Weld geometry
Description
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.
Abstract
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.
Publisher
Elsevier Ltd
Source Title
International Journal of Fatigue
Volume (Issue)
182
Page
108200
Date of Issued
2024-05-01
Language
English
Handle URL
https://hdl.handle.net/11094/94884
PISSN
01421123
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.ijfatigue.2024.108200
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article