High resolution computed tomography and implications for fatigue crack closure modelling

A. Guvenilir*, S. R. Stock

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Understanding the physical bases of a cracked sample's macroscopic response to applied loading, e.g. fatigue crack closure, requires non-destructive, microscopic quantification of the crack face separations as a function of applied load. Ideally, these measurements should cover the entire crack face. Non-destructive sectioning with high resolution X-ray computed tomography has been used for in situ observations of the crack faces under applied load in samples of Al-Li 2090, and in this paper, the crack openings that were measured in the interior of the sample are related to crack face geometry and to changes in the slope of load-displacement curves. The implications of these results are discussed for physically based crack closure modelling.

Original languageEnglish (US)
Pages (from-to)439-450
Number of pages12
JournalFatigue and Fracture of Engineering Materials and Structures
Volume21
Issue number4
DOIs
StatePublished - Jan 1 1998

Keywords

  • 2090 Aluminium alloy
  • Fatigue crack closure
  • Non-destructive evaluation
  • X-ray microtomography

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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