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    On the Estimation of Notch Fatigue Limits by Using the Theory of Critical Distances: L, a0 and Open Notches

    L. Susmel1,2, D. Taylor2, R. Tovo1

    Structural Durability & Health Monitoring, Vol.4, No.1, pp. 1-18, 2008, DOI:10.3970/sdhm.2008.004.001

    Abstract This paper investigates some theoretical aspects related to the use of the Theory of Critical Distances (TCD) when employed to estimate notch fatigue limits. The linear-elastic TCD takes as a starting point the hypothesis that notched components are in their fatigue limit condition when an effective stress, whose value depends on a characteristic length, equals the material plain fatigue limit. Such an idea can be formalised by following different strategies: either assuming that the effective stress depends only on the profile of the stress field damaging the fatigue process zone and the reference distance is a material property or assuming… More >

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