지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2013.12
- 수록면
- 2,336 - 2,340 (5page)
이용수
초록· 키워드
오류제보하기
The impeller is routinely proof loaded during manufacture to verify the strength capability. Over-speed test is one of the proof tests for the rotating part. This kind of proof test could be overload to the normal operation cyclic loading. In general, overload when it comes tensile has a good effect to the product life, since the overload sequence generate compressive residual stress. Under these load history, the effective stress level is decreased by residual stress on unloaded condition. Therefore, fatigue life applied tensile overload could be larger than the normal load. Although there are many of papers to show the overload effect to the life in coupon test or theoretical approach, it has not been prepared for the product base application. In this paper, the residual stress and effective stress on life limited location of the impeller are investigated by applying different levels of over-speed which is overload. Then, fatigue strength estimated according to the amount of overload. Finally, the relation between level of overload and fatigue life is prepared in this specific impeller application. The FE analysis is used to estimate the amount of stress/residual stress by applying each load steps. These stress results are correlated to the fatigue life curve of the material.
목차
Abstract
1. 서론
2. 잔류응력평가
3. 수명평가
4. 결론
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