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R-curve effect on strength and reliability of toughened ceramic materials

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Abstract

An improved theoretical analysis is presented for the strength and mechanical reliability of ceramic materials with an R-curve characteristic. There is good agreement between the predicted flexural strength distribution of an Al2O3/ZrO2 ceramic and experimental datA. Unlike the conventional two-parameter Weibull approach, this new analysis is able to predict the non-linearity observed in the lnln 1/(1−P f) versus In σf strength distribution curve. Compared to the untoughened Griffith material, the R-curve material has higher strength and better strength reliability.

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Author notes

  1. K. Duan

    Present address: CSIRO Division of Exploration and Mining, P.O. Box 883, 4069, Kenmore, Queensland, Australia

Authors and Affiliations

  1. Centre for Advanced Materials Technology, Department of Mechanical and Mechatronic Engineering, The University of Sydney, 2006, New South Wales, Australia

    K. Duan & Y. -W. Mai

  2. Department of Mechanical and Production Engineering, National University of Singapore, 10 Kent Ridge Crescent, 0511, Singapore

    B. Cotterell

Authors
  1. K. Duan
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  2. Y. -W. Mai
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  3. B. Cotterell
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Duan, K., Mai, Y.W. & Cotterell, B. R-curve effect on strength and reliability of toughened ceramic materials. Journal of Materials Science 30, 1405–1408 (1995). https://doi.org/10.1007/BF00375239

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  • DOI: https://doi.org/10.1007/BF00375239

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