파팅라인을 고려한 배기매니폴드와 일체형 터보차저의 열적 가진에 의한 소성변형률 크기 비교
Comparison of Thermally Induced Plastic Strains for Integrated Exhaust Manifold-Turbocharger by Considering Parting-Line Effect
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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.
Abstract
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.
참고문헌 (11)
- Thermal Fatigue of Automotive Components, "V. Ogarevic", SAE, ~, pp.SAE Technical Paper Series No. 2001-01- 0829 (2001)
- 최복록, "터보차져의 파손현상과 열응력 해석", 한국기계기술학회지, 15(6), pp.875~880 (2013), 한국기계기술학회[DOI]
- Thermomechanical Fatigue : Testing Methods and Appilication, "Cesar, A. D.", SAE, ~, pp.SAE Technical Paper Series, 2001-01-4068 (2001)
- B. L. CHOI, "LOW CYCLE THERMAL FATIGUE OF THE ENGINE EXHAUST MANIFOLD", International Journal of Automotive Technology, 5(4), pp.297~302 (2004), 한국자동차공학회
- S. Sissa, "Low-Cycle Thermal Fatigue and High-Cycle Vibration Fatigue Life Estimation of a Diesel Engine Exhaust Manifold", Procedia Engineering, 74, pp.105~115 (2014)
- 이인범, "열충격 및 진동가진에 의한 터빈하우징의 파손현상 예측", 한국기계기술학회지, 16(4), pp.1631~1636 (2014), 한국기계기술학회[DOI]
- D. S. Um, "A new consideration of the heat transfer coefficient and an analysis of the thermal of the high interim pressure turbine casing model", Proceedings of the KSME, pp.425~429 (2004)
- Heuer T., "Thermomechanical Analysis of a Turbo charger Based on Conjugate Heat Transfer", Proc. of the ASME Turbo Expo, pp.829~836 (2005)
- M. Nagode, "A Time-dependent Damage Operator Approach to Thermo-Mechanical Fatigue of Ni-Resist D-5S", International Journal of Fatigue, 33, pp.692~699 (2011)
- A. Weronski, "Thermal Fatigue of Metals", pp.161~172 (1991), Dekker, Inc
- Manson, S. S., "Thermal stress and low-cycle fatigue", pp.245~312 (1996), McGraw-Hill