Experiment and Analysis of Influence of Ultrasonic Peening on Fatigue Life in Pad Welded Joint
Experiment and Analysis of Influence of Ultrasonic Peening on Fatigue Life in Pad Welded Joint
复制标题
超声波喷丸对垫焊接头疲劳寿命影响的试验与分析
DOI：
10.1299/kikaia.74.166
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
H. Shimanuki
中科院分区：
文献类型：
--
作者：
T. Nose;H. Shimanuki
采用RPG载荷下的疲劳寿命分析方法，分析了超声冲击对堆焊接头疲劳寿命的影响。指出超声冲击是提高焊接接头疲劳寿命最有效的方法之一。超声冲击处理，UIT，在这项研究中采用的超声喷丸方法。UIT处理焊趾的垫焊接头的疲劳寿命显着增加。焊趾区残余压应力的引入、应力集中的减少和晶粒的细化是提高焊接接头性能的主要原因。FLARP估算的疲劳寿命与试验结果一致。
Effects of ultrasonic peening on fatigue life of pad welded joint were analyzed by fatigue life analysis method by RPG load. It's noted that the ultrasonic peening is one of the most effective method for improving fatigue life of welded joint. Ultrasonic Impact Treatment, UIT, was adopted in this study as the ultrasonic peening method. A significant increase in fatigue life was observed on the pad welded joint with UIT treated weld toe. The improvement was estimated mainly due to compressive residual stress introducing, stress concentration reducing and grain refining in weld toe area. Estimated fatigue life by FLARP was consistent with experimental result.