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Analysis of Micro-Elastohydrodynamic Lubrication and Prediction of Surface Fatigue Damage in Micropitting Tests on Helical Gears

Lookup NU author(s): Professor Brian Shaw, Dr Jishan Zhang

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Abstract

The paper describes results obtained from the micro-elastohydrodynamic lubrication (micro-EHL) modeling of the gear tooth contacts used in micropitting tests together with a contact fatigue and damage accumulation analysis of the surfaces involved. Tooth surface profiles were acquired from pairs of helical test gears and micro-EHL simulations were performed corresponding to surfaces that actually came into contact during the meshing cycle. Plane strain fatigue and damage accumulation analysis shows that the predicted damage is concentrated close to the tooth surfaces and this supports the view that micropitting arises from fatigue at the asperity contact level. A comparison of the micropitting performance of gears finish-ground by two alternative processes (generation-grinding and form-grinding) suggests that 3D "waviness" may be an important factor in explaining their different micropitting behavior. [DOI: 10.1115/1.4007693]

Publication metadata

Author(s): Evans HP, Snidle RW, Sharif KJ, Shaw BA, Zhang J

Publication type: Article

Publication status: Published

Journal: Journal of Tribology

Year: 2013

Volume: 135

Issue: 1

Pages: 011501

Print publication date: 30/11/2012

ISSN (print): 0742-4787

ISSN (electronic): 1528-8897

Publisher: ASME International

URL: http://dx.doi.org/10.1115/1.4007693

DOI: 10.1115/1.4007693

Notes: Article length: 9 pp.

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