An Analysis of the Behavior of Small Fatigue Cracks Emanating from Stress Concentrators
The plastic zone size (PZS) at the tip of a crack emanating from stress concentrators subjected to uniform tension was calculated based upon the Dugdale model. A method was proposed for the prediction of fatigue notch effects in terms of the McEvily method that has widely been used for the analysis of small fatigue crack growth. In modifying this method, the elastic-plastic effects due to stress concentration were taken into account using the values of PZS calculated in this study. The results predicted by this method accounted successfully for the behavior of small fatigue cracks near the threshold levels observed in the fatigue tests conducted using notched steel specimens.
H.S. Lee, I.S. Yoon and M.H. Aliabadi
S. Ikeda et al., "An Analysis of the Behavior of Small Fatigue Cracks Emanating from Stress Concentrators", Key Engineering Materials, Vols. 385-387, pp. 641-644, 2008