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Roles of microstructure, inclusion, and surface roughness on rolling contact fatigue of a wind turbine gear

Journal Article


Abstract


  • © 2020 Wiley Publishing Ltd. Contact fatigue is a key feature limiting the service lives and reliabilities of gears. The gear contact fatigue failure mechanism has not been understood fundamentally due to the complexities of structural factors, material properties, and operating conditions. In this work, an integrated finite element model of a megawatt level wind turbine gear is established considering the real gear geometry, material microstructure heterogeneity, existence of nonmetallic inclusion, and the tooth surface roughness. The gear steel material properties are defined based on the crystal elasticity anisotropy framework. The modified Dang Van multiaxial criterion is utilized to estimate the material fatigue failure probability during gear engagement. With the developed model, the roles of microstructure, inclusion, and surface roughness on the gear contact fatigue behaviour are comparatively investigated. Additionally, the influences of different inclusion size and surface roughness profile on gear failure risk are investigated and discussed in detail.

Authors


  •   Zhou, Hao (external author)
  •   Wei, Peitang (external author)
  •   Liu, Huaiju (external author)
  •   Zhu, Caichao (external author)
  •   Lu, Cheng
  •   Deng, Guanyu

Publication Date


  • 2020

Citation


  • Zhou, H., Wei, P., Liu, H., Zhu, C., Lu, C. & Deng, G. (2020). Roles of microstructure, inclusion, and surface roughness on rolling contact fatigue of a wind turbine gear. Fatigue and Fracture of Engineering Materials and Structures,

Scopus Eid


  • 2-s2.0-85078803908

Place Of Publication


  • United Kingdom

Abstract


  • © 2020 Wiley Publishing Ltd. Contact fatigue is a key feature limiting the service lives and reliabilities of gears. The gear contact fatigue failure mechanism has not been understood fundamentally due to the complexities of structural factors, material properties, and operating conditions. In this work, an integrated finite element model of a megawatt level wind turbine gear is established considering the real gear geometry, material microstructure heterogeneity, existence of nonmetallic inclusion, and the tooth surface roughness. The gear steel material properties are defined based on the crystal elasticity anisotropy framework. The modified Dang Van multiaxial criterion is utilized to estimate the material fatigue failure probability during gear engagement. With the developed model, the roles of microstructure, inclusion, and surface roughness on the gear contact fatigue behaviour are comparatively investigated. Additionally, the influences of different inclusion size and surface roughness profile on gear failure risk are investigated and discussed in detail.

Authors


  •   Zhou, Hao (external author)
  •   Wei, Peitang (external author)
  •   Liu, Huaiju (external author)
  •   Zhu, Caichao (external author)
  •   Lu, Cheng
  •   Deng, Guanyu

Publication Date


  • 2020

Citation


  • Zhou, H., Wei, P., Liu, H., Zhu, C., Lu, C. & Deng, G. (2020). Roles of microstructure, inclusion, and surface roughness on rolling contact fatigue of a wind turbine gear. Fatigue and Fracture of Engineering Materials and Structures,

Scopus Eid


  • 2-s2.0-85078803908

Place Of Publication


  • United Kingdom