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2003 year, number 4

Application of spectral analysis of surface images to studying the processes of fatigue fracture at the mesoscale level

S.V.Panin, V.I.Syryamkin, and A.I.Glukhikh
Pages: 67–77


Estimation of intensity of local plastic deformation developing under conditions of fatigue fracture is suggested on the basis of a number of numerical characteristics obtained by analyzing a two-dimensional power spectrum of a series of optical images of the surface. It is shown that the presence of a fatigue crack as a region of low information on the image does not exert any significant effect on the calculated results of energy characteristics of the power spectrum. A comparison of the calculated results with the results of fractal dimension calculations shows qualitative similarity of these approaches, which is based on the multidimensionality of measurements implemented in both of the cases.