EFFECTS OF CRACK INITIALIZATION ANGLE ON CRACK PROPAGATION PATH OF THIN RIM GEARS FOR WIND TURBINES
| Autor: | Oğuz Doğan, Fatih Karpat, Onur Kalay |
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| Jazyk: | English<br />Turkish |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Uludağ University Journal of The Faculty of Engineering, Vol 25, Iss 1, Pp 217-230 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2148-4147 2148-4155 |
| DOI: | 10.17482/uumfd.663845 |
| Popis: | Nowadays, wind turbines are one of the main subjects of the designers due to the ever-increasing interest in renewable energy sources. Due to dynamic loads that effect the gear system, cracks may observe on the gear teeth. These cracks may proceed along either the tooth or the rim. In similar cases, if the crack proceeds along with the tooth, crack classified as benign. If the crack proceeds along with the rim direction, the cracks can be classified as catastrophic cracks. In this study, the effects of crack initialization angle and backup ratio on the crack propagation path are investigated numerically for spur gears. The maximum stress location at the gear root is defined as the crack starting point. The initial cracks are opened with 0° - 45° - and 90° crack initialization angles. Also, five different backup ratios are used for crack propagation analysis. The analyses are performed in ANSYS Workbench, SMART Crack Growth module. The crack propagation paths are evaluated for fifteen analyses. As a result, if the rim thickness is high, the crack initialization angle has no effects on the crack paths. It has an influence on the crack propagation paths for the special rim thickness. |
| Databáze: | Directory of Open Access Journals |
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