Failure analysis of the effects of porosity in thermally oxidised nuclear graphite using finite element modelling

C. Berre, S. L. Fok, P. M. Mummery, J. Ali, B. J. Marsden, T. J. Marrow, G. B. Neighbour

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20 Scopus citations

Abstract

Finite element models of thermally oxidised nuclear graphite were generated using three-dimensional high-resolution tomography images. Bulk tensile strength was then evaluated using a smeared-crack model, which shows an exponential decay in the bulk strength with increasing pore volume. The finite element results were in good agreement with radiolytic oxidation experiments. A stochastic analysis using a modified Weibull theory was also performed to describe the evolution of the failure process with increasing load for different levels of porosities.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalJournal of Nuclear Materials
Volume381
Issue number1-2
DOIs
StatePublished - Oct 31 2008

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