Abstract
Bending tests on a ceramic material, lead zirconate-titanate, with varying amounts of porosity, show that the decrease in strength due to spherical pores is much less than would be expected from the stress concentration factor. Using the Weibull probabilistic approach to brittle strength, it is shown that reasonable predictions may be made for the median strength for porosity up to about ten percent.
Résumé
Les essais de flexion sur un matériau céramique: zirconate-titanate de plomb, avec des quantités variables de porosités, montrent que la diminution de la résistance due à la porosité est plus faible que celle donnée par le facteur de concentration de contraintes. En utilisant la méthode statistique de Weibull pour la résistance fragile, il est montré que des prévisions raisonables peuvent être faites pour déterminer la résistance médiane pour une porosité jusqu'aux environs de dix pourcents.
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References
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Vardar, Ö., Finnie, I., Biswas, D.R. et al. Effect of spherical pores on the strength of a polycrystalline ceramic. Int J Fract 13, 215–223 (1977). https://doi.org/10.1007/BF00042561
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DOI: https://doi.org/10.1007/BF00042561