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A J estimation scheme for surface cracks in piping welds

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Figure

Figure 1 – Weld geometry and crack location.
Table 3 – α(M) for a semi-elliptical crack in tension. Values of the coefficients of the function
Figure 3 –  α(M) as a function of M for an axi-symmetrical crack loaded in tension.
Table 5 – local most severe under-estimation of J for pipes with a axi-symmetrical defect under N1 loading, for power-law materials and average mismatch ratios (from σy ratio) of 1.5 and 2.3
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