The problem of evaluating the fatigue life of a cylindrical 09G2S steel sample under uniaxial tension-compression loading is solved numerically. The comparison of the durability numerical simulation results with the experimental results, made with the use of a high-frequency testing machine, demonstrates their convergence before the macrocrack formation stage recorded by the optical method. The further growth of the fatigue crack is monitored by dynamic laser speckle-interferometry. The obtained data allow us to conclude on the possibility of a complex assessment of fatigue failure, which consists in calculating the stage of scattered damage accumulation and monitoring the macrocrack formation and the kinetics of macrocrack growth.

Topics
Fatigue limit, Crack initiation and detection, Speckle imaging, Computer simulation, Educational assessment
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