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• W1987128045 abstract "A model of fatigue crack growth based on elastic-plastic notch stress-strain analysis has been presented. It was assumed that the fatigue crack can be analysed as a notch with the tip radius ρ∗. It was also assumed that the material was composed of elemental blocks of a finite linear dimension ρ∗. The fatigue crack growth was regarded as an increment of successive crack reinitiation over the distance ρ∗ from the crack tip. The number of cycles N∗ necessary to fracture the material over the distance ρ∗ was calculated from the Manson-Coffin strain-life relation. The near-crack tip elasticplastic stress and strain were calculated on the basis of the elastic solution for blunt cracks and energy density criterion derived earlier by the author. Both the near-crack tip mean stress and the fatigue damage accumulation in the material beyond the process zone were included into the analysis. The calculations were based on effective stress intensity range. It was shown that the fatigue crack growth rate in the linear and near-threshold region of the dadN vs ΔK curve can be deducted on the basis of the proposed model and the smooth specimens material data. The effective threshold stress intensity range can be determined also. The theoretical results were compared with the experimental data obtained from three different alloy steels. Good agreement was achieved in both the near-threshold and linear range of the dadN vs ΔK curve." @default.
• W1987128045 created "2016-06-24" @default.
• W1987128045 creator A5083076900 @default.
• W1987128045 date "1985-01-01" @default.
• W1987128045 modified "2023-09-27" @default.
• W1987128045 title "A notch stress-strain analysis approach to fatigue crack growth" @default.
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• W1987128045 doi "https://doi.org/10.1016/0013-7944(85)90014-1" @default.
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