Abstract
Studies concerning effects of flaw size on brittle fracture and elevated-temperature static-fatigue strengths are reviewed. Although ceramic materials fracture elastically, fracture stress has a nonlinear relation to flaw size, and the critical stress intensity factor for a small crack is lower than that for a large crack. The relationship is explained well by a fracture model, which takes into account the interaction between a flaw and the microstructure of the ceramic. A crack can be arrested below a certain stress level, i.e. below the static-fatigue limit. The static-fatigue limit also shows a nonlinear relationship to flaw size similar to that for brittle fracture. The effects of temperature, environment and material on static-fatigue limit are also discussed.
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Usami, S., Takahashi, I., Kimoto, H., Machida, T., Miyata, H. (1987). Fracture and Elevated-temperature Static-fatigue of Ceramics Containing Small Flaws. In: Iida, K., McEvily, A.J. (eds) Advanced Materials for Severe Service Applications. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3445-0_8
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DOI: https://doi.org/10.1007/978-94-009-3445-0_8
Publisher Name: Springer, Dordrecht
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