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Crack Stability and Strength Distribution of Ceramics That Exhibit Rising Crack‐Growth‐Resistance ( R ‐Curve) Behavior
Author(s) -
Shetty Dinesh K.,
Wang JrSheng
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb09700.x
Subject(s) - materials science , weibull modulus , weibull distribution , power law , ceramic , composite material , stability (learning theory) , surface (topology) , modulus , cubic zirconia , mathematics , geometry , statistics , machine learning , computer science
Crack stability and strength distribution are examined for ceramics that exhibit R‐curve behavior. An empirical power‐law description for the R curve leads to simple analytical formulations for the Weibull modulus and the scale parameter; however, the power law is inconsistent with the stability of surface cracks recently observed in MgO‐partially‐stabilized zirconia and coarse‐grained alumina. It is shown that alternate empirical fits to the R curve are compatible with the stable extension of surface cracks, even in the absence of any localized residual stresses.