Abstract
The creep rupture of circumferentially notched, circular tension bars which are subjected to constant load for long periods at constant tem ¬ perature is studied by the approximate calculation of stress and damage histories which result from tertiary creep. Stationary-state creep solutions which have been previously obtained by Hayhurst & Henderson (1977) are used in a continuum damage mechanics study of rupture at the minimum sections of circular (Bridgman 1952) and British Standard notched specimens (B.S. no. 3500, 1969). Notch strengthening and weakening are explained in terms of the multi-axial stress rupture criterion satisfied by the material. It is shown how the circular notch may be used as a materials test and that the British Standard notch is a good means of assessing the sensitivity of structural behaviour to the multi-axial stress rupture criterion of the material.
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