Effect of friction on the contact stress of a coated polymer gear
Abstract Polymer gears are used extensively in various applications. However, durability issues have been emerging because of friction at gear tooth contact areas. To extend the lifetime of polymer gears, a low-frictional coating has been considered as a possible strategy. In this study, a finite el...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2020-07-01
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| Series: | Friction |
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| Online Access: | https://doi.org/10.1007/s40544-020-0363-6 |
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| author | Su-Min Bae Kuk-Jin Seo Dae-Eun Kim |
| author_facet | Su-Min Bae Kuk-Jin Seo Dae-Eun Kim |
| author_sort | Su-Min Bae |
| collection | DOAJ |
| description | Abstract Polymer gears are used extensively in various applications. However, durability issues have been emerging because of friction at gear tooth contact areas. To extend the lifetime of polymer gears, a low-frictional coating has been considered as a possible strategy. In this study, a finite element simulation method was performed to investigate the contact stress between a pair of coated polymer gears. The simulation included various friction coefficients (COFs) for studying the effects of friction during the operation. Numerical results revealed that the friction causes the contact stress to shift over the roll angle, which is attributed to the direction of the sliding friction based on a free-body diagram. We also investigated the effects of coating and found that a thin coating has little effect on the bulk deformation behavior of the gear. Moreover, the stress distribution in the coating at the pitch point was investigated as the COF increased. Under zero friction, three notable stress regions were observed: 1) the center of the surface, 2) the end of the contact, and 3) the overall contact area. As COF was increased in the micro-slip region of the contact interface, both tensile and compressive stresses in the coating increased. This study provides significant aid to engineers for understanding the stress response of the coating applied to polymer gears to achieve an optimal design. |
| format | Article |
| id | doaj-art-d799288da84c460eae5ca1e9fdcb14c6 |
| institution | OA Journals |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2020-07-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Friction |
| spelling | doaj-art-d799288da84c460eae5ca1e9fdcb14c62025-08-20T02:15:41ZengTsinghua University PressFriction2223-76902223-77042020-07-01861169117710.1007/s40544-020-0363-6Effect of friction on the contact stress of a coated polymer gearSu-Min Bae0Kuk-Jin Seo1Dae-Eun Kim2Department of Mechanical Engineering, Yonsei UniversityDepartment of Mechanical Engineering, Yonsei UniversityDepartment of Mechanical Engineering, Yonsei UniversityAbstract Polymer gears are used extensively in various applications. However, durability issues have been emerging because of friction at gear tooth contact areas. To extend the lifetime of polymer gears, a low-frictional coating has been considered as a possible strategy. In this study, a finite element simulation method was performed to investigate the contact stress between a pair of coated polymer gears. The simulation included various friction coefficients (COFs) for studying the effects of friction during the operation. Numerical results revealed that the friction causes the contact stress to shift over the roll angle, which is attributed to the direction of the sliding friction based on a free-body diagram. We also investigated the effects of coating and found that a thin coating has little effect on the bulk deformation behavior of the gear. Moreover, the stress distribution in the coating at the pitch point was investigated as the COF increased. Under zero friction, three notable stress regions were observed: 1) the center of the surface, 2) the end of the contact, and 3) the overall contact area. As COF was increased in the micro-slip region of the contact interface, both tensile and compressive stresses in the coating increased. This study provides significant aid to engineers for understanding the stress response of the coating applied to polymer gears to achieve an optimal design.https://doi.org/10.1007/s40544-020-0363-6coatingcontact stressfinite element method (FEM)frictionpolymer gear |
| spellingShingle | Su-Min Bae Kuk-Jin Seo Dae-Eun Kim Effect of friction on the contact stress of a coated polymer gear Friction coating contact stress finite element method (FEM) friction polymer gear |
| title | Effect of friction on the contact stress of a coated polymer gear |
| title_full | Effect of friction on the contact stress of a coated polymer gear |
| title_fullStr | Effect of friction on the contact stress of a coated polymer gear |
| title_full_unstemmed | Effect of friction on the contact stress of a coated polymer gear |
| title_short | Effect of friction on the contact stress of a coated polymer gear |
| title_sort | effect of friction on the contact stress of a coated polymer gear |
| topic | coating contact stress finite element method (FEM) friction polymer gear |
| url | https://doi.org/10.1007/s40544-020-0363-6 |
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