Mechanics & Industry
Volume 20, Number 6, 2019
|Number of page(s)||16|
|Published online||02 December 2019|
From Hertzian contact to spur gears: analyses of stresses and rolling contact fatigue
Univ. Lyon, INSA-Lyon, CNRS UMR5259, LaMCoS, 20 Avenue Albert Einstein, 69621 Villeurbanne, France
2 Univ. Lyon, ECAM Lyon, INSA Lyon, LabECAM, 40 Montée St Barthélémy, Lyon, France
3 Univ. Lyon, INSA Lyon, MATEIS UMR CNRS 5510, Bât. Blaise Pascal, 7 Avenue Jean Capelle, Villeurbanne, France
4 SAFRAN Transmission Systems, 18 Boulevard Louis Seguin, Colombes, France
* e-mail: firstname.lastname@example.org
Accepted: 10 September 2019
The study of rolling contact fatigue in spur gears requires a good comprehension of all the phenomena occurring at the material scale. On a numerical point of view, a realistic representation of the material and of the load repartition function of the local micro-geometries is needed. However the resulting models are often complex and time-consuming. So, this work aims at developing a model meeting these specificities. Thus, different sections of the spur gear material granular geometry are simulated first. Secondly, the contact pressure fields are computed accurately relatively to the simulated surface microgeometry. Then, the influence of several parameters on their rolling contact fatigue life is highlighted. Among friction, sliding coefficient, load variation and roughness, these individual or combined parameters are taken into account in the model, tested and their impact stressed out. Finally, a fatigue criteria based on rolling contact fatigue micro-cracks nucleation at grain boundaries is proposed in order to compare simulations and influencing parameters to the reference.
Key words: Numerical study / rolling contact fatigue / spur gear / rough micro-geometry
© G. Vouaillat et al., published by EDP Sciences 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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