Author
R. A. Onions
Bio: R. A. Onions is an academic researcher. The author has contributed to research in topics: Surface roughness & Surface finish. The author has an hindex of 1, co-authored 1 publications receiving 26 citations.
Topics: Surface roughness, Surface finish
Papers
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01 Jun 1974
TL;DR: Pitting tests using 127 mm (5 in) centres distance gear rig under controlled conditions are described in this paper, which confirm Dawson's conclusion that an important factor influencing pitting life is the ratio of surface roughness to the calculated lubricant film thickness.
Abstract: Pitting tests using 127 mm (5 in) centres distance gear rig under controlled conditions are described. These are compared with similar disc tests using the same materials and lubricants. Tests of both types confirm Dawson's conclusion that an important factor influencing pitting life is the ratio of surface roughness to the calculated lubricant film thickness. It has been shown that using a hunting tooth ratio, particularly when associated with a rough harder surface and a surface finish oriented normal to the motion, increases the likelihood of wear. Most importantly, the results show that using disc tests can greatly overestimate the pitting life of gears. These experiments and other evidence from the literature suggest that the most probable reason for these differences between gears and discs lies in dynamic gear loads.
27 citations
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01 Jan 1998
TL;DR: In this article, the authors propose a 3.3-approximation algorithm for the 3.1-GHz bandit-16.3 GHz frequency bandit model, and
Abstract: 3
123 citations
TL;DR: In this article, a triple-contact disc machine was used to perform pitting experiments on bearing steel samples under closely controlled contact conditions in a mixed lubrication regime, and the growth of rolling contact fatigue cracks before they develop into surface pits was investigated.
99 citations
TL;DR: In this paper, a brief resume of the theoretical background in the more important situations is given of the application of lubrication theories (based on disc machine tests) to gears, the correlation of disc and gear tests is discussed.
86 citations
TL;DR: In this article, the principal lubrication-related failure modes of gear teeth are discussed, and the complex interactions between gear mechanics and gear lubrication in affecting such failure modes are examined.
Abstract: Any rational approach to gear design must consider, as a minimum, the impact of the various modes of gear-tooth failure on gear performance; operating life and reliability; and size, weight, and cost. Gear teeth may fail basically by either strength-related or lubrication-related causes. However, many strength-related failures are influenced by lubrication, or may be induced by lubrication-related failures. This paper emphasizes the principal lubrication-related failure modes of gear teeth, and examines the complex interactions between gear mechanics and gear lubrication in affecting such failure modes. Presented at the 30th Annual Meeting in Atlanta, Georgia, May 5–8, 1975
46 citations
TL;DR: In this paper, the Amsler disc-on-disc machine was used to obtain the life to first pit for two medicinal white oils and (ii) the same oils plus a sulphur-phosphorus type of extreme pressure additive.
22 citations