Fatigue Resistance Improvement of Welded Joints by Bristle Roll-Brush Grinding

In the periodic repainting of steel bridges, often the steel surface has to be prepared by using power tools to remove surface contaminants, such as deteriorated paint film and rust, and to increase the adhesive strengths of the paint films to be applied newly. Surface preparation by bristle roll-br...

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Bibliographic Details
Published in:International journal of steel structures 2018, 18(5), , pp.1631-1638
Main Authors: Kim, In-Tae, Kim, Ho-Seob, Dao, Duy Kien, Ahn, Jin-Hee, Jeong, Young-Soo
Format: Article
Language:English
Subjects:
Brushes
Butt joints
Butt welding
Civil Engineering
Cleanrooms
Compressive properties
Contaminants
Engineering
Fatigue strength
Fatigue tests
Grinding
Hand tools
Materials Science
Modularity
Repainting
Residual stress
Solid Mechanics
Steel bridges
Surface preparation
Tips
Welded joints
토목공학
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Summary:In the periodic repainting of steel bridges, often the steel surface has to be prepared by using power tools to remove surface contaminants, such as deteriorated paint film and rust, and to increase the adhesive strengths of the paint films to be applied newly. Surface preparation by bristle roll-brush grinding, which is a type of power tool, may additionally introduce compressive residual stress and increase the fatigue resistance of welded joints owing to the impact of rotating bristle tips. In this study, fatigue tests were conducted for longitudinally out-of-plane gusset fillet welded joints and transversely butt-welded joints to evaluate the effect of bristle roll-brush grinding prior to repainting on the fatigue resistance of the welded joints. The test results showed that bristle roll-brush grinding introduced compressive residual stress and significantly increased fatigue limits by over 50%.
ISSN:1598-2351
2093-6311
DOI:10.1007/s13296-018-0059-1