Abstract
The strength evaluation method based on Weibull's statistical theory is often used for estimating the stlength or the reliability of actual ceramic components. However, the validity or the reliability of the method itself has not yet been investigated fully. Comparison is made here between results calculated by the method and experimental results, which are those of bending of prismatic bars, tension and torsion of round bars, bending of notched bars, out-of-plane bending of circular plates with a shoulder fillet and combined bending and torsion of rotor blade root models. It is shown that the method can predict the strength of ceramic components of various sizes and shapes fairly well. However, large portion of the reliability of the method is dependent on that of the value of Weibull modulus m. It is also revealed that there are still several points that remain to be overcome for the method to be used more reliably.
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