Micromechanics modeling of crack initiation under contact fatigue

W. Cheng, H. S. Cheng, T. Mura, L. M. Keer

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

Using dislocation pileup theory, a model is given for the prediction of crack initiation life under contact fatigue. Near surface crack initiation is investigated by introducing the sliding contact boundary condition. Crack initiation originated at the surface and substrate are treated as extreme cases. The new model physically explains how a surface crack can be initiated and shows that the surface crack initiation life should be shorter than the subsurface crack initiation life under the same stress amplitude conditions. A discussion is given about the influence of residual stress, hardness, temperature, irreversibility of the plastic deformation, as well as other parameters that affect the crack initiation life. Preliminary comparisons show that the new model agrees well with the experimental observations of surface and near surface crack initiation.

Original languageEnglish (US)
Pages (from-to)2-8
Number of pages7
JournalJournal of Tribology
Volume116
Issue number1
DOIs
StatePublished - Jan 1994

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Micromechanics modeling of crack initiation under contact fatigue'. Together they form a unique fingerprint.

Cite this