常圧焼結窒化けい素製段付円板の常温および高温強度評価

抄録

Bending fracture tests of sintered silicon nitride disks with shoulder fillet were performed at room temperature and at l000°C. The comparison of the experimental results with statistical reliability analysis showed that strength evaluation method based on the 2-parameter Weibull theory can be applied to estimate the strength of multiaxial stress stated ceramic components. It was observed that the choice of fracture criteria had little effect to the reliability analysis. The correlation of the strength of ceramic components under multiaxial stress state with uniaxial Strength data was made possible using the concept of equivalent stess and effective volume.