Determination of optimal residual stress profiles for improved rolling contact fatigue resistance

Hamidreza Mahdavi*, Konstantinos Poulios, Christian F. Niordson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

A theoretical framework is developed for the evaluation of favorable residual stress profiles, suppressing fatigue damage initiation in rolling contact fatigue. Non-metallic inclusions at the microstructure of bearings are one of the most important reasons for fatigue damage initiation since they act as stress risers. In order to evaluate the stress state around such inclusions at the micro-scale, macroscopic stress histories are determined by Hertzian contact theory at different depths below the raceway for a typical roller bearing. These stress distributions are then used as far-field stresses for a micro-scale model accounting for single inclusions of different geometries and orientations. Eshelby's method is used to relate far-field and local stresses in the vicinity of inclusions. The von Mises stress criterion is then used as a conservative estimator of crack initiation due to micro-scale plasticity. The effect of compressive residual stresses added to the axial and circumferential normal stress components at different depths is analyzed. The von Mises stress field around different inclusions at different depths is investigated in order to determine the most critical case in terms of micro-scale plastic deformation. Finally, an optimization process is carried out in order to determine the residual stresses that minimize the maximum observed von Mises stress as a function of depth.
Original languageEnglish
Title of host publicationMATEC Web of Conferences
Number of pages9
Volume300
PublisherEDP Sciences
Publication date2019
DOIs
Publication statusPublished - 2019
Event12th International Conference on Multiaxial Fatigue and Fracture - Bordeaux, France
Duration: 24 Jun 201926 Jun 2019

Conference

Conference12th International Conference on Multiaxial Fatigue and Fracture
CountryFrance
CityBordeaux
Period24/06/201926/06/2019
SeriesMATEC Web of Conferences
ISSN2261-236X

Bibliographical note

© The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons
Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).

Keywords

  • Rolling contact fatigue
  • Non-metallic inclusions
  • Residual stresses
  • Fatigue damage initiation

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