Applicability of Crack Propagation Data to Failure Prediction in Porcelain

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Abstract
Failure probability of porcelain was measured as a function of time under constant stresses in various environments. The experimental results were compared with the theoretical predictions derived from the measured distribution of fracture stress and subcritical crack growth data. The experimental and theoretical results nearly agreed for the short‐term lifetime (less than ∼1000 s), after which failure probability was less than predicted. The applicability of crack propagation data to failure prediction was studied and the very slow crack‐growth data near the fatigue limit were determined to be necessary for predicting the long‐term lifetime of porcelain structures.