Add to ORKGTo obtain a complete and reliable data set of Weibull parameters for the validation of numerical models for weakest-link failure probability calcns. on ceramic components, uniaxial (3- and 4-point) and biaxial (ball-on-ring and ring-on-ring) bend tests were performed on 2 aluminas. With the uniaxial data sets, the biaxial expts. were predicted applying 2 fracture criteria, the mode I failure and the max. noncoplanar strain energy release rate for penny-shaped cracks. The best fitting criterion for the materials turns out to be different showing a marked difference in their shear stress sensitivity. [on SciFinder (R)