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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2013.12
- 수록면
- 2,629 - 2,633 (5page)
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초록· 키워드
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In this study, flat core structure is formed using alloy 718 by hot gas forming at 980C. Initial blank is composed of 2 sheets which are welded by electron beam welding to get core pattern. To prevent the separation at welding joint during forming, welding width is increased by multi-pass welding. Maximum forming pressure is limited 48 bar considering the strength of die and capacity of pressurization system. Forming process is analyzed by numerical method. Flow stress equation is determined by free bulging test and it is a function of strain-rate sensitivity and strength coefficient. 2D and 3D models are used for analysis and its results are compared with experimental results in deformed shape. Analysis using 3D model shows good agreement. In case of 2D model, it has a little difference because model is considered as plane strain. But it will be more useful using 2D model to save computational cost and to find the response in various boundary conditions.
목차
Abstract
1. 서론
2. 고온 유동 특성
3. 코어 성형
4. 유한요소 해석
5. 결론
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