Earticle

초록

영어

Thermal external cracks can be initiated at the parting line, which is the dividing line that splits the core and cavity halves of a molded exhaust manifold-turbine housing. The fatigue cracks are often resulted from hot-cold cycle loads called by thermal shock cycles, and are accompanied by large plastic strains. This paper investigated the effects of parting lines of the integrated exhaust manifold-turbine housing and compared the magnitude of plastic strains directly correlated to low cycle fatigue damages or cracks. The finite element results showed that the plastic strains at runner junctions including parting line was calculated by 0.68%, which is approximately 60% higher than that of the turbine housing considering no parting line. So, if the analysis target is less than 0.50 % of plastic strain amplitude, the fatigue damages or cracks could be expected by considering the parting lines in integrated exhaust manifold-turbocharger.

목차

ABSTRACT
1. 서론
2. 유한요소 해석
2.1 재질 특성
2.2 일체형 터빈하우징 유한요소모델
2.3 온도분포 해석
2.4 열응력과 소성변형률
3. 결론
References

키워드

배기매니폴드 일체형 터보차저 파팅 라인 열피로 주기적 응력-변형률 선도 소성변형률 진폭 유한요소해석 Integrated exhaust manifold-turbocharger Parting-line Thermal fatigue Cyclic stress-strain curve Plastic strain amplitude Finite element analysis

저자

• 최복록 [ Bok-Lok Choi | Member, Professor, Gangneung-Wonju National University Department of Automotive Engineerin ] Corresponding Author

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