Fatigue Resistance Improvement of Welded Joints by Bristle Roll-Brush Grinding |
| |
Authors: | In-Tae Kim Ho-Seob Kim Duy Kien Dao Jin-Hee Ahn Young-Soo Jeong |
| |
Affiliation: | 1.Department of Civil Engineering,Pusan National University,Busan,Korea;2.Department of Civil Engineering,Ho Chi Minh City University of Technology and Education,Ho Chi Minh,Vietnam;3.Department of Civil Engineering,Gyeongnam National University of Science and Technology,Jinju,Korea;4.Seismic Simulation Test Center,Pusan National University,Yansan,Korea |
| |
Abstract: | 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%. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|