Effect of superimposed compressive stresses on rolling contact fatigue initiation at hard and soft inclusions

Hamidreza Mahdavi*, Konstantinos Poulios, Christian F. Niordson

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A semi-analytical framework is introduced for the evaluation of favorable residual stresses for delaying rolling contact fatigue initiation. Subsurface stress histories are applied to a micro-scale model accounting for isolated inclusions of different types and geometries. Micro-scale von Mises stresses are calculated based on Eshelby’s method and considered as an estimator of crack initiation due to plastic deformation. The most critical cases in terms of micro-scale plasticity are identified, and the effect of macro-scale compressive residual stresses is considered. Finally, optimized residual stresses are determined that minimize the maximum attained micro-scale von Mises stress at different depths.
Original languageEnglish
Article number105399
JournalInternational Journal of Fatigue
Volume134
Number of pages9
ISSN0142-1123
DOIs
Publication statusPublished - 2020

Keywords

  • Rolling contact fatigue
  • Non-metallic inclusions
  • Residual stresses
  • Fatigue damage initiation
  • Eshelby’s method

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