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A study is presented of a constant stress intensity factor specimen comprising four circular cutouts. The results of fatigue crack growth tests, compliance measurements, and a finite element formulation show that minor modifications to a center cracked tension specimen lead to constancy in the stress intensity factor as a function of crack length. The basic geometry can also be repeated in a stacked configuration in order to test multiple cracks in a single setup.
Senior Research Officer, National Aeronautical Establishment, National Research Council of Canada, Ottawa, Ontario
Stock #: JTE11262J