Ja. Salem et al., RELIABILITY-ANALYSIS OF UNIAXIALLY GROUND BRITTLE MATERIALS, Journal of engineering for gas turbines and power, 118(4), 1996, pp. 863-871
The fast fracture strength distribution of uniaxially ground, alpha si
licon carbide was investigated as a function of grinding angle relativ
e to the principal stress direction in flexure. Both as-ground and gro
und/annealed surfaces were investigated. The resulting flexural streng
th distributions were used to verify reliability models and predict th
e strength distribution of larger plate specimens tested in biaxial fl
exure. Complete fractography was done,on the specimens. Failures occur
red from agglomerates, machining cracks, or hybrid flaws that consiste
d of a machining crack located at a processing agglomerate. Annealing
eliminated failures due to machining damage. Reliability analyses were
performed using two and three-parameter Weibull and Batdorf methodolo
gies. The Weibull size effect was demonstrated for machining flaws. Mi
xed mode reliability models reasonably predicted the strength distribu
tions of uniaxial flexure and biaxial plate specimens.