0
research-article

Evaluation of contact fatigue life of a wind turbine gear pair considering residual stress

[+] Author and Article Information
Heli Liu

State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China
1669078924@qq.com

Huaiju Liu

State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China
huaijuliu@cqu.edu.cn

Caichao Zhu

State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China
cczhu@cqu.edu.cn

Haifeng He

State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China
1434150367@qq.com

Peitang Wei

State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China
peitangwei@cqu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4039164 History: Received July 21, 2017; Revised December 27, 2017

Abstract

Contact fatigue is a main fatigue mode of gears such as those used in wind turbines, due to heavy duties occurred in engineering practice. The understanding of the gear contact fatigue should be based on the interaction between the local material strength and the stress state. Under the rolling-sliding motion, the multiaxial stress state makes the gear contact fatigue problem more complicated. A numerical contact model is proposed to evaluate the contact fatigue life of an intermediate parallel gear stage of a megawatt level wind turbine gearbox. The gear meshing theory is applied to calculate the geometry kinematics parameters of the gear pair. The gear contact is assumed as a plane strain contact problem without the consideration of the influence of the helical angle. The quasi-static tooth surface load distribution is assumed along the line of action. The elastic mechanics theory is used to calculate the elastic stress field generated by surface tractions. The discrete convolute, fast Fourier transformation (DC-FFT) method is applied to estimate the subsurface stresses distributions. In order to describe the time-varying multiaxial stress states during contact, the Matake, Findley, DangVan multiaxial fatigue criterion are used to calculate the critical planes and equivalent stresses. Both the statistic and the deterministic fatigue life models are applied by choosing the Lundberg-Palmgren (LP), Zaretsky models, respectively. The effect of the residual stress distribution on the contact fatigue initiation lives is discussed. In addition, the crack propagation lives are estimated by using the Paris theory.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In