Author/Authors :
Berre، نويسنده , , Robert C. W. Fok، نويسنده , , S.L. and Mummery، نويسنده , , P.M. and Ali، نويسنده , , J. and Marsden، نويسنده , , B.J. and Marrow، نويسنده , , T.J. and Neighbour، نويسنده , , G.B.، نويسنده ,
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.
