레일용접부 피로수명 예측

초록

This paper focuses on the prediction of rail bending fatigue lifes for the purpose of the effective maintenance of surface irregularities of rail welded parts. The rail bending stresses are calculated using a track dynamic analysis program. The rail surface irregularities measured in situ are given as inputs in the analyses. On the other hand, the S-N curve is derived based on the results of bending fatigue tests. Based on these data, rail fatigue lifes are estimated by adopting the modified Miner's rule. The useful guides for maintenance of rail welded parts are proposed in terms of grinding period and grinding depth of rail surface irregularities.