잔류응력을 고려한 필렛 가스용접 이음재의 수명예측과 신뢰도 평가

서지정보

· 발행기관 : 한국기계기술학회
· 수록지 정보 : 한국기계기술학회지 / 12권 / 2호
· 저자명 : 백승엽, 오선

목차

Abstract
1. 서론
2. 확률론적 통계해석 방법
2.1 가속수명예측 및 적합도 검증
2.2 가속수명예측 및 적합도 검증
2.3 가속수명시험 모형
2.4 가속수명예측
3. 가속수명예측에 대한 신뢰도 평가
3.1 필렛용접 이음재
4. 결론
참고문헌

영어초록

Gas welding is a very important and useful technology in the fabrication of railroad cars and commercial vehicle structures. However, since the fatigue strength of gas-welded joints is considerably lower than that of the parent material due to stress concentration at the weld, the fatigue-strength assessment of gas-welded joints is very important for the reliability and durability of railroad cars and the establishment of a criterion for long-life fatigue design. In this paper, in order to save time and cost for the fatigue design, an accelerated life-prediction method that is based on the theory of statistical reliability was investigated. Its usefulness was verified by comparing the (Δσa)R-Nf relationship that was obtained from actual fatigue test results with the (Δσa)R-(Nf)ALP relationship that was derived from accelerated life testing. And the reliability of the predicted life was evaluated. The reliability of the accelerated life-prediction on the base of actual test data was analyzed to be (81～86)% of the actual test life of the fillet-type gas welded joint.

참고자료

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