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- W1976803670 abstract "Fracture mechanics approach is applied to fatigue crack initiation at the tips of deep, blunt notches including those with very small notch-tip radius. The theoretical relations between the stress intensity range ΔKρ and the notch-tip radius ρ for a fixed life for crack initiation were derived based on the models of dislocation-dipole accumulation and blocked slip-band. Those are approximated by a simpler equation: ΔKρΔKo = (1 + ρ/ρ0)12 where ΔK0 and ρ0 are material constants which are related to the fatigue strength of smooth specimens Δρ0 as Δρ0 = 2ΔK0(πρ0)12. The results of experiments done with bluntly notched compact tension specimens of a structural low-carbon steel agree with the above relation between ΔKgrΔKo and ρ/ρo. The method to predict ΔKo, ρo and Δρo from the fatigue data of cracked and smooth specimens is proposed." @default.
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- W1976803670 date "1983-01-01" @default.
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- W1976803670 title "Fracture mechanics approach to fatigue crack initiation from deep notches" @default.
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- W1976803670 doi "https://doi.org/10.1016/0013-7944(83)90073-5" @default.
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