Abstract
The paper analyses simple models that simulate the effect of: (a) a kink, (b) a U-loop and (c) a T-junction on the stability of a circumferential through-wall crack in a Type 304 stainless steel piping system. The instability criterion is expressed in terms of the applied and material tearing moduli, i.e. T PP and T MAT , or equivalently in terms of an effective pipe length L EFF . L EFF is expressed as a function of the position of the cracked section for each of the model piping systems and it is therefore possible to specify the positions where T APP is a maximum, and identify these positions in relation to the bends in the three systems.
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