Fracture mechanics is fundamental to the understanding of the mechanical properties of ceramics. Although the basic Griffith equation is applicable in simple cases, complications arise because the fracture surface energy or fracture toughness are not independent of crack size and vary with time, and crack interaction effects are also significant. Weibull statistics are used to discuss statistical variations in strength. Practical examples for grinding wheels and prosthetic hip joints illustrate the principles of performance prediction. Some problems associated with high-temperature deformation are introduced.
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