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Allowable final crack depth - Number of design cycles

Allowable final crack depth - Number of design cycles

Allowable final crack depth - Number of design cycles

(OP)
Hello everyone,

I have started working recently with Asme Section VIII Division 3. According to KD-412, one of the conditions to estimate the number of design cycles is propagating a crack from the initial assumed flaw size to the critical crack depth, but how should I work in the case that the critical crack depth is larger than the cylinder thickness and the a/t coefficients are under 0.8?

Thank you for your help

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