표제지
국문요약
목차
제1장 서론 12
1.1. 연구 배경 12
1.2. 연구 목표 및 세부내용 13
제2장 실험 세부사항 15
2.1. 실험 시편 15
2.2. 실험 방법 20
제3장 실험결과 및 고찰 24
3.1. EPDM 모재 글래스런 채널의 파손 및 마찰 특성 24
3.1.1. PU 코팅의 파손 24
3.1.2. Flocking 코팅의 파손 30
3.1.3. Lip의 영구 변형 33
3.1.4. 마찰 특성 변화 36
3.2. TPV 모재 글래스런 채널의 파손 및 마찰 특성 39
3.2.1. Slip 코팅의 파손 및 lip의 영구 변형 39
3.2.2. 마찰 특성 변화 41
제4장 결론 43
References 45
ABSTRACT 47
Table 1. Substrates and coatings for all lips of specimens 17
Fig. 2.1. Photographs of the cross-section of (a) GRC1, (b) GRC2, (c) GRC3, and (d) GRC4. All specimens have INRL and OTRL. EPDM substrate was used for (a), (b), and (c). TPV substrate was... 15
Fig. 2.2. Confocal microscope images of cross-section of (a) PU and UHMWPE coating, (b) Flocking coating, (c) PU coating, and (d) Slip coating. Coatings (a), (b) and (c) were used for specimen of EPDM... 16
Fig. 2.3. Confocal microscope images of surface and 3D height of (a) PU and UHMWPE coating, (b) Flocking coating, (c) PU coating, and (d) Slip coating. 19
Fig. 2.4. Photographs of the tester for glass run channel specimen. The friction force was obtained from the loadcell equipped with the tester during the test. The relative position between glass run channel... 20
Fig. 2.5. Images of 2D simulation result of (a) GRC1, (b) GRC2, (c) GRC3, and (d) GRC4 using MSC. Marc. 21
Fig. 2.6. Reaction forces of lips with respect to specimens and test conditions. For GRC1, GRC2, and GRC3 specimens, the counter specimen moved 0.50 mm in direction of OTRL under offset condition.... 21
Fig. 2.7. Photograph of 3D laser scanning confocal microscope (VK-X200, Keyence) used for observing the specimens.[원문불량;p.11] 22
Fig. 3.1. Confocal microscope images of the surface and 3D height of (a) GRC1-U, and (b) GRC2 after normal and offset condition tests. The PU and UHMWPE coating was applied to OTRL of two... 25
Fig. 3.2. Confocal microscope images of the surface and 3D height of (a) GRC1-U, (b) GRC1-F, (c) GRC2, and (d) GRC3 after normal and offset condition tests. The PU coating was applied to INRL1 of... 28
Fig. 3.3. Schematics of the degradation mechanism of PU bumps during the test. The schematics represent the (a) ripple-liked pattern, and (b) surface crack. 29
Fig. 3.4. Bump height decrease rate of (a) OTRL in GRC1-U and GRC2, and (b) INRL1 and INRL2 in all specimens with EPDM substrate after normal and offset condition tests. 30
Fig. 3.5. Confocal microscope images of the surface and 3D height of (a) GRC1-F, and (b) GRC3 after normal and offset condition tests. The Flocking coating was applied to OTRL of two specimens. 31
Fig. 3.6. Average surface roughness of OTRL in GRC1-F and GRC3 before and after two test conditions. 32
Fig. 3.7. Cross-sectional height profiles of the OTRL of (a) GRC1-U, (b) GRC1-F, (c) GRC2, and (d) GRC3 after normal and offset condition tests. The PU and UHMWPE coating was applied to GRC1-U... 34
Fig. 3.8. Schematics of the degradation mechanism of lips during the test. The schematics represent the (a) deflection, and (b) stretching of the lips. 35
Fig. 3.9. Average height decrease of OTRL in (a) GRC1-U, (b) GRC1-F, (c) GRC2, and (d) GRC3 after normal and offset condition tests. Under the normal condition, the height decrease of the lip of GRC2... 35
Fig. 3.10. Variation of friction forces with respect to the sliding distance under (a) normal condition, and (b) offset condition, and (c) the average friction force in the last 5 km in all cases with EPDM substrate. 37
Fig. 3.11. Confocal microscope images of the surface and 3D height of (a) OTRL, and (b) INRL in GRC4 after normal and offset condition test. The Slip coating was applied to OTRL and INRL of GRC4. 40
Fig. 3.12. Cross-sectional height profiles of (a) OTRL, and (b) INRL in GRC4 after normal and offset condition tests. 41
Fig. 3.13. Average height decrease of OTRL and INRL in GRC4 after normal and offset condition tests. 41
Fig. 3.14. (a) Variation of friction forces with respect to the sliding distance in GRC4, and (b) the average friction force in the last 5 km in GRC4 under normal and offset condition tests. 42