Fatigue Characteristic Evaluation in Water Pipe Welds Considering of Welding Residual Stress

용접잔류응력을 고려한 상수도 강관의 피로특성 평가

In case of large steel water pipe, it have been observed that its fracture mostly occurs due to the complicated outside fatigue load on the pipe in the underground. It is also well known that its damage and leakage happen mainly in a weld zone. In this study we evaluated the fatigue characteristics based on size effect and residual stress by comparing the test results on the standard specimen collected from real pipe with those on full scale pipe.