Computational modelling of shot-peening effects on crack propagation under fretting fatigue

S. Shkarayev, S. Mall

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Recent experimental studies have demonstrated fretting fatigue life enhancement of titanium alloy Ti-6Al-4V specimens after treatment by shot-peening. Because of complexities in tracking crack growth under fretting conditions experimentally, the present work describes computational modelling for crack propagation behaviour in specimens with and without shotpeening. A crack growth model is combined with a finite element submodelling technique to assess the crack trajectory and crack propagation life in the specimens under fretting fatigue. A parametric numerical analysis has been performed to investigate crack trajectories and stress intensity factors along the crack path under different loading conditions. Obtained results revealed the features of the crack growth trajectory and stress intensity factors in the presence of residual stresses from shot-peening. These results also demonstrated a significant (2-3 times) increase in the crack propagation life of shot-peened specimens relative to virgin specimens (i.e. without shot-peening), which is in agreement with experimental observations.

Original languageEnglish (US)
Pages (from-to)495-506
Number of pages12
JournalJournal of Strain Analysis for Engineering Design
Volume38
Issue number6
DOIs
StatePublished - Nov 1 2003

Keywords

  • Computational modelling
  • Crack propagation
  • Fretting fatigue
  • Shot-peening

ASJC Scopus subject areas

  • Modeling and Simulation
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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