Abburi Venkata, Kiranmayi

Ainsworth, Robert

Gintalas, Marius

The increasing use of constraint arguments for defect assessments of large-scale components such as pipes requires estimates of suitable parameters to characterise crack tip constraint. The simplest such parameter is the elastic T-stress. However, for pipes, such solutions are not readily available. Therefore,this paper reports the results of an extensive series of finite element calculations to provide normalised T-stress solutions for pipes for a range of geometry and crack sizes. Comparisons with the limited solutions in the literature are used to give confidence in the numerical solutions obtained, which are shown to be sensitive to mesh refinement. The results are provided in a form that is suitable for use in practical defect assessments such as the constraint modified failure assessment diagram approach

T-STRESS SOLUTIONS FOR CRACKS IN STRAIGHT PIPES

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