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Grain‐Size Dependence of Fracture Energy in Ceramics: II, A Model for Noncubic Materials
Author(s) -
RICE R. W.,
FREIMAN S. W.
Publication year - 1981
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.1151-2916.1981.tb10301.x
Subject(s) - anisotropy , grain size , materials science , ceramic , fracture (geology) , maxima , energy (signal processing) , condensed matter physics , composite material , mineralogy , physics , geology , optics , art , quantum mechanics , performance art , art history
A mathematical model of the grain‐size dependence of fracture energy of noncubic ceramics is developed and discussed. This model attributes the maxima in fracture energy of noncubic materials to countertrends of increasing numbers of microcracks and decreasing energy absorption per microcrack as grain size increases. The model predicts results similar to those experimentally observed. Agreement between calculated and measured fracture energy values is generally good, except for materials with extreme anisotropy. Sources of these differences and methods of improving calculations are discussed.