NOTCH STRENGTH OF CERAMICS AND STATISTICAL-ANALYSIS

In the present study experiments are carried out to measure the notch strength of alumina ceramics. Test results show that the notch strengt h of ceramics, sigma(N), follows the normal distribution and the flexi ble strength of ceramics, sigma(bb), also follows the normal distribut ion. Analysis of the test results of the notch strength of ceramics sh ows that there is a correlation between the mean values of the notch a nd flexible strength of K-t .sigma(N) = sigma(bb), and the product of the standard deviation of the notch strength, s(N) and the stress conc entration factor. K-t, is equal to s(f), the standard deviation of the flexible strength i.e. K(t)s(N) = s(t). As a result, the probability distribution of the notch strength can be predicted from that of the f lexible strength of ceramics tested under identical conditions.