Abstract
The processes of initiation and growth of fatigue macrocracks near stress concentrators are regarded as a two-parameter process described by the range of local stresses and the linear (structural) parameter of the material, namely, the size of the prefracture zone d *. We show that the value of d * determines the value of the cyclic stress concentration factor K f and the length of the initial macrocrack a i = d *. We perform the comparative analysis of the experimental and numerical procedures used for the evaluation of the parameter d *. For beam and compact specimens with notches, we compare the results of evaluation of the factor K f obtained on the basis of author's approach and by using the well-known relations of Neuber and Peterson.
Published Version
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