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Strength versus Gauge Length in Ceramic‐Matrix Composites
Author(s) -
Curtin William A.
Publication year - 1994
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.1151-2916.1994.tb07271.x
Subject(s) - composite material , materials science , gauge (firearms) , composite number , ceramic matrix composite , ceramic , slip (aerodynamics) , matrix (chemical analysis) , length scale , physics , mechanics , metallurgy , thermodynamics
The strength of ceramic‐matrix composites as a function of sample gauge length is derived as a function of the composite constituent material properties. Within the context of a global load‐sharing assumption for how load is transferred from broken to unbroken fibers, the analysis shows that, for samples shorter than 0.8δ c (where δ c is the characteristic‐slip length determining composite pullout), the composite ultimate strength increases with decreasing gauge length. For samples longer than 0.8δ c , the strength is independent of gauge length. Implications of these results on the performance of composites with small‐scale stress concentrators is briefly discussed.