“…Fatigue progression of the cracks from the edge and from the surface is used as a basis for proposing a system of inspections of details, which tend to be damaged by fatigue [2], [3], [4], sensitivity analysis [5] [6], probabilistic analysis of the S-N field [7], [8] and crack propagation rate [9] etc. The input data are usually material properties [10], [11], [12], [13], [14] and information about boundary conditions-calibration curves [15].…”