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Fatigue Life Estimation for Welds of Truck Frames for Rolling Stock Using Stress Frequency in Service Load

DOIFull Paper Access

11

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0

References

2007

Year

Yasutomo ODA, Tsuyoshi Yagi, Tomohiro OKINO, Hiromichi Ishiduka
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A

Abstract

The fatigue strength of weld surface of truck frames has been estimated according to the fatigue limit diagram in JIS E 4207, “General Rules for Design of Truck Frames for Railway Rolling Stock”. However, it is impossible to predict the fatigue life by using this fatigue limit diagram. This study has proved the possibility of fatigue life estimation for welds of truck frames according to the Modified Miner's rule. In order to estimate the fatigue life, three items are used such as the S-N diagram assumed from allowable stress in JIS E 4207 or fatigue design curve of JSSC, relation of crack occurrence vs. running distance and stress frequency distribution in service load.