Fatigue notch sensitivity

An estimate of the effect of a notch or hole of a given size and shape on the fatigue properties of a material; measured by q = (Kf - 1)/( Kt - 1), where Kf is the fatigue notch factor and Kt is the stress-concentration factor. A material is said to be fully notch sensitive if q approaches a value of 1.0; it is not notch sensitive if the ratio approaches 0.
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