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| Fatigue life prediction for weld line in heavy freight carbody based on ASME standard |
| Received:August 20, 2010 Revised:January 17, 2011 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20121023 |
| KeyWord:freight carbody weld line fatigue life equivalent structural stress method |
| Author | Institution |
| 谢素明 |
大连交通大学 交通运输工程学院, 大连 |
| 周晓坤 |
大连交通大学 交通运输工程学院, 大连 |
| 李向伟 |
大连交通大学 交通运输工程学院, 大连 |
| 李晓峰 |
大连交通大学 交通运输工程学院, 大连 |
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| Abstract: |
| Aiming at finding a more exact method to predict weld line fatigue life in heavy freight carbody during design phase,the fatigue life of armor steel 616 Tee joint is analyzed by various standards.Comparing analysis results and experimental results,the equivalent structural stress method offered by ASME standard is of high accuracy and obvious advantage.A finite element model of a heavy freight carbody including key weld lines is built,fatigue life prediction for these weld lines is performed by means of the equivalent structural stress method and load spectrum of AAR,and weld line of more shorter fatigue life is basically coincident with that in-service carbody.The improved structure of bolsters is to be put forward on the basis of structural stress analysis at weld lines,and fatigue life of the bolsters weld line is increased by 1.7 times. |
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