Ad. Papargyris, ESTIMATOR TYPE AND POPULATION-SIZE FOR ESTIMATING THE WEIBULL MODULUSIN CERAMICS, Journal of the European Ceramic Society, 18(5), 1998, pp. 451-455
Analysis of fracture data in ceramics can be made by applying probabil
istic theories. In order the fracture probability to be expressed an e
stimator must be used. For economic reasons it is also necessary, the
population size for estimating the shape ceramic parameter, to be foun
d. In the present work a number of estimators and sets of different sa
mple populations of kaolin ceramics are tested against the stability o
f the weibull shape parameter. The 2-parameter and 3-parameter Weibull
functions and the Neville function were compared for best fitting of
results. It seems that modulus remains almost constant in the range of
the specimen numbers tested and a minimum number of about 30 specimen
s is acceptable for reliability predictions at least for the examined
type of ceramic. (C) 1998 Elsevier Science Limited All rights reserved
.