Abstract
A large volume, thin-walled vessel was weakened by the introduction of a longitudinal slit sealed from the inside. With the help of compact-tension specimens and wide plates, attempts were made to analyse the failure by means of elastic-plastic fracture mechanics, taking into account the bulging of the vessel by the use of the so-called ‘Folias factor’. With J R curves obtained from wide plate tensile tests, the crack driving force curves provide stresses at crack initiation and instability which are approximately 20–30% below the corresponding values of the internal pressure test. With regard to stable crack growth, very good agreement was achieved.
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