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싱글 립실과 더블 립실의 유막 두께에 관한 수치적 연구
김태환(Taehwan Kim),김한구(Hangoo Kim),심종현(Jonghyun Shim),김청균(Chungkyun Kim) 한국트라이볼로지학회 2007 한국트라이볼로지학회 학술대회 Vol.2007 No.6
The most important thing is the obtainment of stable sealing capacity and durability on the design for lip seal. Thus studies on the oil film thickness and design of oil film should be performed fundamentally and sufficiently. But unfortunately it is very difficult to design oil film through the FEM analysis and experimental method. Because the oil film varies variously due to diversity of circumstances. This paper presents the numerical result of the oil film thickness with various factors.
김태환(Taehwan Kim),김한구(Hangoo Kim),김도현(Dohyun Kim),김청균(Chungkyun Kim) 한국트라이볼로지학회 2006 한국트라이볼로지학회 학술대회 Vol.2006 No.11
This paper presents the numerical results of the contact force and durability with optimized design of lip seal. Using the finite element method based on the Ogden model, the contact force and durability of lip seals were analyzed to illuminate the effect of various shaft interferences and the shape of lip seals. And the optimized design is performed through the Taguchi method. The results show that No.5 model is the best model. And the interference, angle and displacement(d) is important factors.
ADAS 용 보행자 검출을 위한 적외선 데이터베이스 구축 동향과 방사 분석 온도 기반의 적외선 데이터베이스 구축
김태환(Taehwan Kim),김태훈(Taehoon Kim),손민석(Minseok Son),김성호(Sungho Kim),이은령(Eunryung Lee),마수드(Masoud afrakhteh),박미룡(Miryong Park) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6
This paper overviews the history of the infrared datasets for the advanced driver assistant system(ADAS) related pedestrian detection, which raised the issue. When viewed at the representatives, most of them are not appropriate considering ADAS. Infrared datasets for ADAS have the problem of converted far infrared(FIR) intensity. Thus, building the radiometric temperature based infrared dataset can overcome some restrictions and develop the potential of the this field.
립 실의 최적화 설계에 따른 접촉력 및 내구성 비교 해석
김태환(Taehwan Kim),김한구(Hangoo Kim),김도현(Dohyun Kim),김청균(Chungkyun Kim) 한국트라이볼로지학회 2006 한국트라이볼로지학회 학술대회 Vol.2006 No.6
This paper presents the numerical results of the the contact force and dulability with optimized design of lip seal. Using the finite element method based on the Mooney-Rivlin model, the contact force and dulability of lip seals were analyzed to illuminate the effect of various shaft interferences and the shape of lip seals. And the optimized design is performed through the Taguchi method. The results show that No.4 model is best model. And the inteference, angle and round is important factors.
레이저로 적층 제조한 금속 기지재 복합재료의 설계 및 제조 연구동향
김민겸 ( Min-kyeom Kim ),김태환 ( Taehwan Kim ),김주원 ( Ju-won Kim ),김동원 ( Dongwon Kim ),방영젠 ( Yongjian Fang ),노종환 ( Jonghwan No ),서종환 ( Jonghwan Suhr ) 한국복합재료학회 2021 Composites research Vol.34 No.4
금속 기지재 복합재료들(MMCs, Metal matrix composites)은 우수한 기계적 물성(강성, 강도, 마모 저항성, 경도 등)과 뛰어난 특성(열전도, 전기전도도, 부식 저항 등)으로 다양한 산업군에 활용되고 있다. 적층제조 기술이 발달함에 따라 복잡한 형상을 시간과 비용을 절약하여 제조할 수 있다는 이점으로, 적층 제조한 MMCs에 관한 연구가 활발하게 이루어지고 있다. 하지만 MMCs를 적층 제조할 경우, 다양한 원인들에 의해 여러 문제들이 발생할 수 있다. 따라서 본 연구에서는 다양한 MMCs의 특징들을 소개하고, 위의 문제들이 발생하는 원인을 고찰하여 소재와 Powder bed fusion (PBF) 공정 설계 관점에서 해결책을 제시하고자 한다. 본 논문은 향후 PBF 방식으로 적층 제조한 MMCs를 개발할 때 설계 및 제조 가이드라인을 제시하여 줄 수 있을 것이다. Metal matrix composites (MMCs) were widely used in various industries, due to the excellent properties: high strength, stiffness, wear resistance, hardness, thermal conductivity, electrical conductivity, etc. With additive manufacturing (AM) technology rapidly developed, AM MMCs have been actively investigated thanks to the cost- and time-saving manufacturing. However, several issues still need to be addressed before fabricating AM MMCs. Here, several types of MMCs were introduced and MMCs’ design methods to tackle the issues were suggested in a powder bed fusion (PBF) technique. The paper could come up with a guideline for the material and process design of MMCs in the PBF technique.