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Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue

机译：滚动接触疲劳下风力发电机齿轮箱轴承的损伤机理研究

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Wind turbine gearbox bearings fail with the service life is much shorter than the designed life. Gearbox bearings are subjected to rolling contact fatigue (RCF) and they are observed to fail due to axial cracking, surface flaking, and the formation of white etching areas (WEAs). The current study reviewed these three typical failure modes. The underlying dominant mechanisms were discussed with emphasis on the formation mechanism of WEAs. Although numerous studies have been carried out, the formation of WEAs remains unclear. The prevailing mechanism of the rubbing of crack faces that generates WEAs was questioned by the authors. WEAs were compared with adiabatic shear bands (ASBs) generated in the high strain rate deformation in terms of micro-structural compositions, grain refinement, and formation mechanism. Results indicate that a number of similarities exist between them. However, substantial evidence is required to verify whether or not WEAs and ASBs are the same matters.
机译：风力涡轮机变速箱轴承发生故障，其使用寿命比设计寿命短得多。齿轮箱轴承承受滚动接触疲劳（RCF），并且观察到它们由于轴向裂纹，表面剥落和白色蚀刻区域（WEA）的形成而失效。当前的研究回顾了这三种典型的故障模式。讨论了潜在的主导机制，重点是WEA的形成机制。尽管已进行了大量研究，但WEA的形成仍不清楚。作者们质疑产生WEA的裂纹面摩擦的主要机制。在微观结构组成，晶粒细化和形成机理方面，将WEA与在高应变率变形中产生的绝热剪切带（ASB）进行了比较。结果表明它们之间存在许多相似之处。但是，需要大量证据来验证WEA和ASB是否相同。

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