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학술저널
저자정보
심재웅 (연세대학교) 크리스찬 니콜라스 디 카로 (캘리포니아대학교) 서국진 (연세대학교) 김대은 (연세대학교)
저널정보
한국트라이볼로지학회 Tribology and Lubricants 한국윤활학회지 제35권 제6호
발행연도
2019.12
수록면
337 - 342 (6page)

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This paper presents an experimental investigation of friction and wear characteristic with respect to patterns occurring on the surface of 3D printed polymer products by fused deposition modeling method. The purpose of this study was to investigate the effect of the patterns and sliding directions on the tribological properties of 3D printed polymer surface. A cubic specimen was printed using polylactic acid filament as the printing material. Friction tests were conducted for different directions with respect to the patterns that were generated on the top and the side surfaces of the specimen, by using a ball-on-reciprocating type tribotester. SUJ2 bearing ball of which the diameter was 11 times greater than the width of the largest pattern was used as the counter surface to assess the frictional behavior. Friction tests were conducted on the top and the side surfaces with respect to the patterns in 3 (0˚, 45˚, 90˚) different directions respectively. Coefficient of friction increased as cycles increased in all cases. The results of the tests showed that the lowest coefficient of friction was measured with the 45˚ sliding direction on the side surface. The wear rate was the lowest at 45˚ sliding direction on the side surface, while it was the highest at 0˚ sliding direction on the top surface. Coefficient of friction of about 0.45 was determined to be the converging value on the top compared to the side surface.

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