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The main objective of this study is to evaluate the strength reliability of ceramics for mechanical component applications based on fracture mechanics. This paper discribes an algorithm for the strength reliability evaluation of cermics and prediction of the life of PSZ (Partially Stabirized Zirconia) components according to the proposed algorithm. Extensive crack growth is observed prior to the final fracture during cyclic three-point bending and it is confirmed that PSZ exhibits a linear relationship on logarithmic scale between the fatigue crack growth rate da/dN and the stress intensity factor range Delta K. Statistical characteristics of the crack growth rate parameters C, m and the fatigue fracture toughness value Kfc are also found to fit well with Weibull distribution. It was found that the estimated life of PSZ components decreases with increasing stress range and initial crack length and with decreasing fracture probability.
Strength reliability evaluation of ceramics (I). A proposal of evaluation algorithm and it's application to life prediction of PSZ
Additional title:
Ermittlung der mechanischen Zuverlaessigkeit von Keramik (I): Vorchlag fuer einen Algorithmus und seine Anwendung auf die Lebensdauer von teilweise stabilisiertem Zirkoniumoxid
Titel japanisch