A Review on Micropitting Studies of Steel Gears
TLDR
In this article, the authors reviewed recent relevant studies on the micropitting of steel gears, especially the competitive phenomenon that occurs among several contact fatigue failure modes when considering gear tooth surface wear evolution.Abstract:
With the mounting application of carburized or case-hardening gears and higher requirements of heavy-load, high-speed in mechanical systems such as wind turbines, helicopters, ships, etc., contact fatigue issues of gears are becoming more preponderant. Recently, significant improvements have been made on the gear manufacturing process to control subsurface-initiated failures, hence, gear surface-initiated damages, such as micropitting, should be given more attention. The diversity of the influence factors, including gear materials, surface topographies, lubrication properties, working conditions, etc., are necessary to be taken into account when analyzing gear micropitting behaviors. Although remarkable developments in micropitting studies have been achieved recently by many researchers and engineers on both theoretical and experimental fields, large amounts of investigations are yet to be further launched to thoroughly understand the micropitting mechanism. This work reviews recent relevant studies on the micropitting of steel gears, especially the competitive phenomenon that occurs among several contact fatigue failure modes when considering gear tooth surface wear evolution. Meanwhile, the corresponding recent research results about gear micropitting issues obtained by the authors are also displayed for more detailed explanations.read more
Citations
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Effects of lubrication on gear performance: A review
TL;DR: This work reviews gear lubrication papers with focus on gear efficiency, contact fatigue and dynamics, and compile and categorize key investigations in an expansive field with substantial recent research.
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Study on gear contact fatigue failure competition mechanism considering tooth wear evolution
TL;DR: In this paper, the authors proposed a model incorporating the interface characteristics, mechanical properties and residual stress gradients to explore this competition mechanism during wear process of a wind turbine gear pair and found that the critical damage position moves deeper from near-surface to subsurface during the wear process.
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A study of effects of tooth surface wear on time-varying mesh stiffness of external spur gear considering wear evolution process
TL;DR: In this paper, a wear prediction model for external spur gear (ESG) was established according to the Archard's wear equation, and a modified analytical time-varying mesh stiffness (TVMS) model was derived by the potential energy method.
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Ratchetting–multiaxial fatigue damage analysis in gear rolling contact considering tooth surface roughness
TL;DR: In this article, an elastic-plastic finite element contact fatigue model was proposed considering the optically measured tooth surface roughness and the gear contact geometry, and the contribution of the ratchetting-fatigue damage in the mechanism of gear contact fatigue problems was discussed.
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