Numerical simulation of strength test on graphite moderator bricks using a continuum damage mechanics model

Z. Zou, S. L. Fok, B. J. Marsden, S. O. Oyadiji

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Experimental tests on graphite moderator bricks with keyways have been simulated using a failure model recently developed by the authors based on continuum damage mechanics. Failure of the specimens, induced by the application of pure bending moment, is characterised by unstable crack propagation, with very small cracks and damage zones formed at the keyway corners immediately before final rupture. Sensitivity of the predictions to the keyway corner radius, variations in material properties and the presence of methane holes have also been investigated. Good agreement has been achieved between the predicted failure strengths and the available experimental data.

Original languageEnglish (US)
Pages (from-to)318-330
Number of pages13
JournalEngineering Fracture Mechanics
Volume73
Issue number3
DOIs
StatePublished - Feb 1 2006

Keywords

  • Crack propagation
  • Damage
  • Failure model
  • Moderator bricks
  • Nuclear graphite

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