Abstract
We have studied the dependence of the fatigue life of smooth and notched specimens on various parameters of the notch-tip stress-strain state in the region of high-cycle fatigue prior to crack initiation. The tests were carried out on specimens of 30KhGSA steel and D16AT and AMtsM alloys with various stress concentrators. Local strains were measured using strain gauges with a small nominal length by the hysteresis loop method. It is shown that in the case of equal values of residual-stress amplitudes, the values of fatigue life coincide. We have proposed a relationship for calculating the residual-strain amplitude and have compared the calculated results with the experimental data.
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