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The influence of a residual stress field on the fatigue crack growth was investigated by a numerical simulation for an inclined elliptically shaped subsurface crack in a half space. The necessary opening mode stress intensity factors Kl caused by the resulting stress field were calculated by means of the singular integral equation method. The crack growth analyses were conducted by the application of linear elastic fracture mechanics using the Paris law relationship between Kl and da/dN.
steel cylinder, inclined elliptical subsurface crack, carbonitriding, shot-peening, residual stresses, cyclic bending, singular integral equation method, effective stress intensity factor, fatigue crack growth
Research engineer, VOEST-ALPINE Ind. (VAI), Linz,
Professor, Institute of Mechanics and Christian Doppler Laboratory for Micromechanics of Materials, University for Mining and Metallurgy, Leoben,
Research assistant, Institute of Mechanics, University for Mining and Metallurgy, Leoben,