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Introduction of a reverse simulation approach to identify the fatigue stress intensity factor crack arrest threshold from fretting cracking experiments

Authors
Journal
Tribology International
0301-679X
Publisher
Elsevier
Volume
76
Identifiers
DOI: 10.1016/j.triboint.2013.10.016
Keywords
  • Fatigue Stress Intensity Factor Threshold
  • Fretting Crack
  • Finite Element Method
  • Mixed Mode Crack Growth

Abstract

Abstract The aim of this study was to estimate the ΔKth crack arrest stress intensity factor related to the crack arrest condition of a material subjected to partial slip fretting loadings, by coupled experimental and numerical simulation. The study focuses on a plane (Al-alloy)/cylinder (TA6V) interface. Fretting tests were performed for each configuration to obtain the crack length as a function of the number of fretting cycles, in order to establish the crack length related to crack arrest condition. Using a reverse FEM analysis of crack arrest fretting experiments, the thresholds ΔKth(fr) are extracted. Two 2196-T8 and 2196-UA aluminium alloys were compared, while the short crack arrest versus the crack length evolutions were formalized using a Kitagawa Takahashi formalism.

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