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전성재,강인혁,류미라,조연상,박홍식 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
Generally, Oxidization film are generated by friction and wear in lubricant oil. It is effect that the heat and pressure act on contact area. Because the electrons movement progress the oxidization, if the electrons movement be regulated, the thickness of oxidization film can be regulated and friction characteristics can be improved. But electronic current can deteriorate friction characteristics, so various characteristics must be investigated on transforming of electronic current. Therefor, using the Norton equation, short current were transformed between ball and disk. Also, an experiment was carried out using ball on disk type tester. So, we studied up on effect of current for friction characteristics.
적응적 요소 재구성을 이용한 타이어 트레드 성형의 유한 요소 해석
김용환(Y.H.Kim),이현영(H.Y.Lee),류민영(M.Y.Lyu) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Automobile tire has very complicated shape and is composed of rubber, steel cord and ply cord. Tread pattern of tire is very essential for the basic characteristics of tire, such as braking, acceleration and comfortableness. Tire components such as tread, sidewall, and apex are prepared by forcing uncured rubber compound through an extruder to shape during curing process. Because of its complexity of shape, adaptive mesh refinement was used for the analysis of tire tread. Effects of forming variables were evaluated.
유영숙(Y.S.Lyu),류정호(J.H.Ryu),엄명도(M.D.Eom),전민선(M.S.Jeon),김대욱(D.U.Kim),정성운(S.U.Jung),김득수(D.S.Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
In Rio de Janeiro in June 1992, The around world adapt convention on climate change which indicated to start international effort for prevention of greenhouse. According to agree the obligatory reduction of greenhouse gas specified Gyoto protocol, Our country which is 10th of the world in greenhouse gas emission, member of OECD will be pressured to reduce greenhouse gas.<br/> In this study in order to prepare obligatory reduction measure estimated the greenhouse gas emission factor and emission from automobile which is basic data to make emission statistics by Tier 3 method.<br/> In this study, in order to investigate greenhouse gas emission characteristics from gasoline passenger cars, 30 vehicles were tested on the chassis dynamometers and N,O, one of major greenhouse gas, were measured. The emission characteristics by manufacturer, model year, displacement, and vehicles speed were discussed.