Abstract
Gross-strain crack tolerance is a measure of fracture toughness that is useful where yielding precedes fracture yet flaw size must be treated quantitatively. In these tests, rectangular bars containing surface fatigue cracks were pulled in tension at several temperatures. Strains were measured at the edges of the specimen on a gage length spanning the plane of the crack, and also in the gross section above and below the crack. Gross-strain crack tolerance is the strain at maximum load on the gage length designated. It is shown to be a function of crack size, constraint, and temperature.
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