Weakest-link failure predictions for ceramics III: Uniaxial and biaxial bend tests on alumina

✍ Scribed by B.J de Smet; P.W Bach; H.F Scholten; L.J.M.G Dortmans; G de With

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 615 KB
• Volume: 10
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/0955-2219(92)90124-v

✦ Synopsis

To obtain a complete and reliable data set o[ Weibull parameters jbr the validation of numerical models for weakest-link failure probability calculations on ceramic components, uniaxial (three-and four-point) and biaxial (ball-on-ring and ring-on-ring) bend tests were performed on two aluminas. With the uniaxial data sets, the biaxial experiments were predicted applying two.fi+acture criteria, the mode I failure and the maximum 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.