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- W641569482 abstract "Recently, it has been reported that the fracture stress σf and the fracture toughness Kc of engineering ceramics, measured by use of short precracks, have values lower than, σf = KIC/(πc)1/2 and KC = KIC, which might be expected from the conventional fracture mechanics. In the present study, assuming that these phenomena are due to the effect of a microdefect formed ahead of a main crack under applied stress, we propose a main crack-microdefect interaction model and formulate it using the theory of continuous distribution of dislocation in order to explain the above experimental results. As a result, we obtain the stress intensity factor K at the tip of the microdefect in a closed form. Supposing that macroscopic fracture would be caused when the stress intensity factor K reaches the plane-strain fracture toughness KIC, we can obtain the analytical expressions of the fracture stress σf and the fracture toughness Kc and explain the above phenomena theoretically." @default.
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- W641569482 date "1993-01-01" @default.
- W641569482 modified "2023-09-26" @default.
- W641569482 title "Effect of a Microdefect ahead of a Main Crack on Strength of Solids.(1st Report, Approximate Solution in Terms of a Main Crack Stress Field)." @default.
- W641569482 doi "https://doi.org/10.1299/kikaia.59.2248" @default.
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