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Influence of toughness on Weibull modulus of ceramic bending strength

Published online by Cambridge University Press:  03 March 2011

K. Kendall ,
N. McN. Alford ,
S. R. Tan  and
J. D. Birchall
K. Kendall
Affiliation:
ICI New Science Group, P.O. Box 11, The Heath, Runcorn, England
N. McN. Alford
Affiliation:
ICI New Science Group, P.O. Box 11, The Heath, Runcorn, England
S. R. Tan
Affiliation:
ICI New Science Group, P.O. Box 11, The Heath, Runcorn, England
J. D. Birchall
Affiliation:
ICI New Science Group, P.O. Box 11, The Heath, Runcorn, England
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Abstract

It is demonstrated both theoretically and experimentally that fracture toughness does not directly influence the Weibull modulus of ceramic bending strength for materials that obey the Griffith criterion for crack propagation. Weibull modulus remains unchanged as toughness is increased. However, toughness variations with crack length do affect the Weibull modulus. Thus materials that display R-curve behavior or Dugdale character give an increased Weibull modulus and appear more reliable.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 1 , February 1986 , pp. 120 - 123
Copyright
Copyright © Materials Research Society 1986

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References

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