Abstract
Global and boundary collocation solutions for K(I), CMOD, and the full-field stress patterns of a single-edge notched tension specimen were compared to determine the accuracy of each technique and the utility of each for determining solutions for the short and the deep crack case. It was demonstrated that inclusion of internal stress conditions in the collocation, i.e., performing a global rather than a boundary collocation solution, expands the range of crack lengths over which accurate results can be obtained. In particular, the global collocation approach provided accurate results for crack lengths between 10 percent and 80 percent of the specimen width for a typical specimen geometry. Comparable accuracy for boundary collocation was found only for crack lengths between 20 percent and 60 percent of the specimen width. 27 refs.
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