Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox Bearings
The fatigue crack initiation direction of wind turbine gearbox bearings is investigated. Through theoretical research，it is believed that the direction of crack initiation depends on the direction of the maximum shear stress amplitude plane at the local initiation position. After calculation，it is f...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Journal of Mechanical Transmission
2022-08-01
|
| Series: | Jixie chuandong |
| Subjects: | |
| Online Access: | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2022.08.006 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841548889121882112 |
|---|---|
| author | Haibo Sun Feng Shen |
| author_facet | Haibo Sun Feng Shen |
| author_sort | Haibo Sun |
| collection | DOAJ |
| description | The fatigue crack initiation direction of wind turbine gearbox bearings is investigated. Through theoretical research，it is believed that the direction of crack initiation depends on the direction of the maximum shear stress amplitude plane at the local initiation position. After calculation，it is found that the orthogonal shear stress amplitude of the shallow layer inside the bearing raceway is greater than the principal shear stress amplitude，and the principal shear stress amplitude at the deeper layer is greater than the orthogonal shear stress amplitude. Therefore，the crack initiation angle varies with the initiation depth. Aiming at the problem of crack propagation，the method of stress superposition in the polar coordinate of the crack tip in fracture mechanics is used to clarify the influence of Hertz contact stress，residual stress，assembly interference pressure，etc. on the direction of crack propagation. The applicability of the theory is verified by analyzing the failure cases of bearings with different thermal treatment microstructure. |
| format | Article |
| id | doaj-art-db7f3cf492194424892bd89709e4a18a |
| institution | Kabale University |
| issn | 1004-2539 |
| language | zho |
| publishDate | 2022-08-01 |
| publisher | Editorial Office of Journal of Mechanical Transmission |
| record_format | Article |
| series | Jixie chuandong |
| spelling | doaj-art-db7f3cf492194424892bd89709e4a18a2025-01-10T13:57:23ZzhoEditorial Office of Journal of Mechanical TransmissionJixie chuandong1004-25392022-08-0146333830484574Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox BearingsHaibo SunFeng ShenThe fatigue crack initiation direction of wind turbine gearbox bearings is investigated. Through theoretical research，it is believed that the direction of crack initiation depends on the direction of the maximum shear stress amplitude plane at the local initiation position. After calculation，it is found that the orthogonal shear stress amplitude of the shallow layer inside the bearing raceway is greater than the principal shear stress amplitude，and the principal shear stress amplitude at the deeper layer is greater than the orthogonal shear stress amplitude. Therefore，the crack initiation angle varies with the initiation depth. Aiming at the problem of crack propagation，the method of stress superposition in the polar coordinate of the crack tip in fracture mechanics is used to clarify the influence of Hertz contact stress，residual stress，assembly interference pressure，etc. on the direction of crack propagation. The applicability of the theory is verified by analyzing the failure cases of bearings with different thermal treatment microstructure.http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2022.08.006Bearing failureCrack initiationCrack propagation directionHertz contactResidual stress |
| spellingShingle | Haibo Sun Feng Shen Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox Bearings Jixie chuandong Bearing failure Crack initiation Crack propagation direction Hertz contact Residual stress |
| title | Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox Bearings |
| title_full | Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox Bearings |
| title_fullStr | Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox Bearings |
| title_full_unstemmed | Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox Bearings |
| title_short | Study on Internal Fatigue Crack Initiation and Propagation Direction of Wind Turbine Gearbox Bearings |
| title_sort | study on internal fatigue crack initiation and propagation direction of wind turbine gearbox bearings |
| topic | Bearing failure Crack initiation Crack propagation direction Hertz contact Residual stress |
| url | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2022.08.006 |
| work_keys_str_mv | AT haibosun studyoninternalfatiguecrackinitiationandpropagationdirectionofwindturbinegearboxbearings AT fengshen studyoninternalfatiguecrackinitiationandpropagationdirectionofwindturbinegearboxbearings |