Lifetime prediction of ceramic components after proof testing
by Heinz Hubner
International Journal of Materials and Product Technology (IJMPT), Vol. 2, No. 3/4, 1987

Abstract: Failure times and fracture stresses of an electrical porcelain were measured on samples which survived a preceding proof test. The data were compared with predictions made by combining the model of time-dependent strength of ceramics with proof-testing theory. The close coincidence showed that the proof-testing procedure employed was able to eliminate the weak samples without affecting the strength of the survivors. All measured data of failure time and fracture stress of proof-tested samples exceeded the minimum values predicted by the model. It was concluded that proof testing is a suitable means to provide a lower limit of the material's performance, even under service conditions where subcritical growth of the strength-controlling flaws occurs.

Online publication date: Sun, 07-Nov-2010

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