Abstract
Three-dimensional finite element analysis of shallow semi-elliptical surface flaws in the centre of rectangular welds was undertaken, and the effects of varying weld mismatch and weld width on J-integrals and Q-values were investigated. An interesting relationship between weld width and the applied load at failure, as predicted from a J–Q failure locus, was observed. The practicalities of modifying the J- and Q-estimation schemes developed for homogeneous plates to include mismatch effects were investigated using a limited parametric study.
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