A comparative study of fatigue behavior between S-shaped and involute POM gears
- Resource Type
- Article
- Authors
- Wu Ruo; Wei Peitang; Lu Zehua; Liu Huaiju; Zorko Damijan; Xie Huaijie
- Source
- Journal of Computational Design and Engineering , 9(6), pp.2483-2494 Dec, 2022
- Subject
- 기계공학
- Language
- English
- ISSN
- 2288-5048
2288-4300
Applications of polymer gears have been gradually expanding from motion transmission to power transmission fields. Design of new gear teeth profiles plays a crucial role in meeting the requirement of replacing metallic gears with polymer ones. This work develops a computational framework consisting of tooth profile generation and fatigue life prediction of S-shaped and involute POM gears. The contact and bending fatigue performances of S-shaped and involute POM gears under oil lubrication are comparatively studied. It is found that the S-shaped profile reduces the tooth root stress by 25% and significantly improves the bending fatigue life by 10 times compared with the involute profile, especially under medium or high loading levels. Furthermore, the S-shaped gear with a single circular-filleted root curve benefits a 20% reduction of tooth root stress and a 30% increase in bending fatigue life compared to a double circular-filleted root curve S-shaped gear.