Effects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet Clutch
Paper-based friction materials used for wet clutches in automatic transmissions require various tribological functions such as a high and stable friction coefficient, good μ-V (friction coefficient-sliding velocity) characteristics, heat resistance, and wear resistance. In this study, microsc...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Japanese Society of Tribologists
2015-12-01
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| Series: | Tribology Online |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/trol/10/5/10_390/_pdf/-char/en |
| _version_ | 1818900208592879616 |
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| author | Shintaro Yagi Nobuyuki Katayama Hiroaki Hasegawa Hiroshi Matsushita Shin-ichiro Okihara |
| author_facet | Shintaro Yagi Nobuyuki Katayama Hiroaki Hasegawa Hiroshi Matsushita Shin-ichiro Okihara |
| author_sort | Shintaro Yagi |
| collection | DOAJ |
| description | Paper-based friction materials used for wet clutches in automatic transmissions require various tribological functions such as a high and stable friction coefficient, good μ-V (friction coefficient-sliding velocity) characteristics, heat resistance, and wear resistance. In this study, microscale texture was formed on the surface of a paper-based friction material using a picosecond pulse laser, and the friction characteristics were investigated using the SAE#2 test system. Stripe-shaped microtexture (microgrooves) with several patterns of depth and pitch were formed on the friction material surface and controlled by the laser processing conditions. The dynamic friction coefficient was particularly improved by the microgrooves under low temperature and low surface pressure conditions. The coefficient changed according to the depth and pitch of the microgrooves, which is related to the volume ratio (microgroove volume per unit volume of paper-based friction material). These results indicate that the dynamic friction coefficient for the wet clutch can be controlled by changing the groove volume ratio according to the laser processing conditions. A new paper-based friction material with a high static friction coefficient (μs) and good μ-V characteristics could be developed by control of the dynamic friction coefficient without changing the pore characteristics of the paper. |
| first_indexed | 2024-12-19T20:00:13Z |
| format | Article |
| id | doaj.art-2a63889b7a10452394f36fa07b598da7 |
| institution | Directory Open Access Journal |
| issn | 1881-2198 |
| language | English |
| last_indexed | 2024-12-19T20:00:13Z |
| publishDate | 2015-12-01 |
| publisher | Japanese Society of Tribologists |
| record_format | Article |
| series | Tribology Online |
| spelling | doaj.art-2a63889b7a10452394f36fa07b598da72022-12-21T20:07:41ZengJapanese Society of TribologistsTribology Online1881-21982015-12-0110539039610.2474/trol.10.390trolEffects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet ClutchShintaro Yagi0Nobuyuki Katayama1Hiroaki Hasegawa2Hiroshi Matsushita3Shin-ichiro Okihara4Graduate School for the Creation of New Photonics IndustriesResearch and Development Division, F.C.C. CO., LTD.Research and Development Division, F.C.C. CO., LTD.Research and Development Division, F.C.C. CO., LTD.Graduate School for the Creation of New Photonics IndustriesPaper-based friction materials used for wet clutches in automatic transmissions require various tribological functions such as a high and stable friction coefficient, good μ-V (friction coefficient-sliding velocity) characteristics, heat resistance, and wear resistance. In this study, microscale texture was formed on the surface of a paper-based friction material using a picosecond pulse laser, and the friction characteristics were investigated using the SAE#2 test system. Stripe-shaped microtexture (microgrooves) with several patterns of depth and pitch were formed on the friction material surface and controlled by the laser processing conditions. The dynamic friction coefficient was particularly improved by the microgrooves under low temperature and low surface pressure conditions. The coefficient changed according to the depth and pitch of the microgrooves, which is related to the volume ratio (microgroove volume per unit volume of paper-based friction material). These results indicate that the dynamic friction coefficient for the wet clutch can be controlled by changing the groove volume ratio according to the laser processing conditions. A new paper-based friction material with a high static friction coefficient (μs) and good μ-V characteristics could be developed by control of the dynamic friction coefficient without changing the pore characteristics of the paper.https://www.jstage.jst.go.jp/article/trol/10/5/10_390/_pdf/-char/enpaper-based friction materialsurface texturewet clutch |
| spellingShingle | Shintaro Yagi Nobuyuki Katayama Hiroaki Hasegawa Hiroshi Matsushita Shin-ichiro Okihara Effects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet Clutch Tribology Online paper-based friction material surface texture wet clutch |
| title | Effects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet Clutch |
| title_full | Effects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet Clutch |
| title_fullStr | Effects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet Clutch |
| title_full_unstemmed | Effects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet Clutch |
| title_short | Effects of Microscale Texture on the Tribological Behavior of Paper-Based Friction Materials for a Wet Clutch |
| title_sort | effects of microscale texture on the tribological behavior of paper based friction materials for a wet clutch |
| topic | paper-based friction material surface texture wet clutch |
| url | https://www.jstage.jst.go.jp/article/trol/10/5/10_390/_pdf/-char/en |
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