용접패스에 따른 레일 육성용접부 잔류응력 평가

초록

Even though repairing welding has been adopted as a useful remedial process for railway rail, cracks were reported beneath weld surfaces under cyclic wheel-to-rail contact condition. In the present paper, optimization of the repairing welding was examined to prevent unanticipated defects in a typical rail. Sensitivity analyses of welding pass effect were carried out according to several welding passes by using finite element analysis. Residual stress distributions were obtained and compared, of which observations can be used as a technical basis to establish suitable corrective actions.