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윤활미끄럼마찰에서 Micro-scale crosshatch grooved surface pattern의 size effect와 angle effect간 실험적 분석
채영훈(Younghun Chae),김석삼(Seocksam Kim) 한국트라이볼로지학회 2006 한국트라이볼로지학회 학술대회 Vol.2006 No.11
Surface pattern of tribological applications has potential technology of engineered surface. The current study investigated the effect of size and angle of micro-scale crosshatched grooved pattern on tool steel(SKD Ⅱ) using pin-on-disk. The samples fabricated by photolithography and electrochemical etching process. We demonstrated the lubrication mechanism for a Stribeck curve. It was found that the friction coefficient is changed by an angle of crosshatch on contact surface. We discuss that analysis of experiment data has some trend of friction property for crosshatch grooved surface pattern. Also optimum crosshatch angle depend on groove size.
Micro Surface Groove Pattern의 실험적 마찰기구 해석
채영훈(Younghun Chae),김석삼(Seocksam Kim) 한국트라이볼로지학회 2007 한국트라이볼로지학회 학술대회 Vol.2007 No.6
Surface pattern of tribological applications has potential technology of engineered surface. The current study investigated the effect of size and angle of micro-scale crosshatched grooved pattern on tool steel(SKD 11) using pinon-disk. The samples fabricated by photolithography and electrochemical etching process. We demonstrated the lubrication mechanism for a Stribeck curve. It was found that the friction coefficient is changed by an angle of crosshatch on contact surface. We discuss that analysis of experiment data has some trend of friction property for crosshatch grooved surface pattern. Also optimum crosshatch angle depend on groove size.
Micro-scale surface texture 마찰기구에 대한 실험적 해석
채영훈(Younghun Chae),김석삼(Seocksam Kim) 한국트라이볼로지학회 2005 한국트라이볼로지학회 학술대회 Vol.2005 No.6
The current study investigated the effect of Micro-scale surface pattern to understand the potential benefits of friction reduction and durability in relative contact. It was verified that the friction property with respect to the surface feature and geometry factor under lubricated sliding contact. Additionally, it was recognized from Stribeck curve that the friction property has a connection with geometry factor. This can explain the relationship between the friction property and a dimensionless parameter for lubrication condition. It is suggested that the ratio of dip is an important parameter for surface texture design.
Micro-scale surface texturing을 기반으로 한 저마찰효과에 대한 기초연구
채영훈(Younghun Chae),김석삼(SeockSam Kim) 한국트라이볼로지학회 2004 한국트라이볼로지학회 학술대회 Vol.39 No.-
Surface texturing of tribological application is another attractive technology of friction reducing. Also, reduction of friction is therefore considered to be a necessary requirement for improved efficiency of machine. In this paper attempts to investigate the effect of density for micro-scale dimple pattern using photolithography on bearing steel flat mated with pin-on-disk. We demonstrated the lubrication mechanism for a Stribeck curve, which has a relationship between the friction coefficient and a dimensionless parameter for lubrication condition. It is found that friction coefficient is depended on the density of surface pattern. It was thus verified that micro-scale dimple could affect the friction reduction considerably under mixed and hydrodynamic lubrication conditions from based on friction map. Lubrication condition regime has an influence on the friction coefficient induced the density of micro dimple.
혼합 및 유체윤활하에서 micro-scale Crosshatch grooved surface pattern의 사잇각도에 따른 마찰특성
채영훈(Younghun Chae),김석삼(Seocksam Kim) 한국트라이볼로지학회 2006 한국트라이볼로지학회 학술대회 Vol.2006 No.6
Some surface pattern of tribological applications is an attractive technology of engineered surface. Therefore, friction reduction is considered to be necessary for improved efficiency of machines. This study investigated the effect of friction property for angles of micro-scale crosshatch grooved surface pattern on bearing steel flat mated with pin-on-disk. We obtain sample which can be fabricated by photolithography process. We discuss friction property depend on an angle of cross-hatch grooved pattern. We can verify the lubrication mechanism as a Stribeck curve, which has a relationship between the friction coefficient and a dimensionless parameter under the lubrication condition. It was found that the friction coefficient was related to angle of crosshatch on surface, even when surface pattern was the same density.
디젤엔진 라이너표면의 마이크로 crosshatch 그루우브 패턴의 사잇각도에 따른 마찰제어기술
채영훈(Younghun Chae),김석삼(Seocksam Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Surface pattern of tribological applications is an attractive technology of engineered surface. Therefore, friction reduction is considered to be necessary for improved efficiency of machines. This study investigated the effect of friction property for angles of micro-scale crosshatch grooved surface pattern on bearing steel flat mated with pin-on-disk. We obtain sample which can be fabricated by photolithography process. We discuss friction property depend on an angle of cross-hatch grooved pattern. We can verify the lubrication mechanism as a Stribeck curve, which has a relationship between the friction coefficient and a dimensionless parameter under the lubrication condition. It was found that the friction coefficient was related to angle of crosshatch on surface, even when surface pattern was the same density.
혼합윤활조건에서 마이크로딤플의 크기에 따른 마찰특성평가
이승훈,최시근,김규만,채영훈(Younghun Chae),한무경,이영춘 한국트라이볼로지학회 2008 한국트라이볼로지학회 학술대회 Vol.2008 No.11
The current study investigated the size effect of Micro-scale surface pattern to understand the potential benefits of friction reduction and durability in relative contact. Also, reduction of friction is therefore considered to be a necessary requirement for improved efficiency of machine. In this paper attempts to investigate the effect of density for micro-scale dimple pattern on bearing steel flat mated with pin-on-disk. We demonstrated the lubrication mechanism for a Stribeck curve, which has a relationship between the friction coefficient and a dimensionless parameter for lubrication condition. It is found that friction coefficient is depended on the density of surface pattern. It was thus verified that micro-scale dimple could affect the friction reduction considerably under mixed and hydrodynamic lubrication conditions from based on friction map. Lubrication condition regime has an influence on the friction coefficient induced the density of micro dimple.