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In this paper, extensions of the reference stress based method to estimate Jand COD for through-wall cracked pipes to general problems are given. These problemsinclude circumferential through-wall cracked pipes under combined pressure and bendingor under combined axial tension and bending; complex cracked pipes under combinedaxial tension and bending; axial through-wall cracked pipes under combined pressure andbending. For these cases, the proposed reference stress based J and COD estimates arevalidated against published test data and detailed 3-D FE results to show their accuracyand robustness.