Abstract:SummaryA method for the estimation of the CTOD fracture toughness c from toughness results of bend specimens with a machined notch has been studied. The Weibull stress criterion is adopted as a brittle fracture criterion. The equivalent CTOD ratio β has been defined as the ratio of CTOD of the fatigue crack specimen to CTOD _M of the machined notch specimen (β = / _M) at the same level of the Weibull stress. CTOD tests are conducted for SM490A steel. It has been found that the equivalent CTOD ratio β is useful… Show more
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