Abstract
Recent experimental results have indicated that the J integral may serve as a valid parameter for predicting elastic-plastic plane strain fracture. Similar confirmation for thin section or predominantly plane stress fracture does not exist. The purpose of this investigation was to examine experimentally the validity of a J integral fracture criterion by performing tests on thin section metals. Seven alloys and three specimen configurations were tested under conditions that caused elastic-plastic fracture. Results indicated that a critical value of J existed for each alloy that could be used as a fracture criterion.
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