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Inclusion‐Initiated Fracture Model for Ceramics
Author(s) -
Sung Jason,
Nicholson Patrick S.
Publication year - 1990
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.1151-2916.1990.tb06565.x
Subject(s) - inclusion (mineral) , fracture toughness , materials science , composite material , fracture (geology) , stress intensity factor , ceramic , thermal expansion , tetragonal crystal system , residual stress , modulus , fracture mechanics , mineralogy , geology , crystallography , chemistry , crystal structure
The fracture of ceramics initiating from a typical inclusion is analyzed. The inclusion is considered to have a thermal expansion coefficient and fracture toughness lower than those of the matrix and a Young's modulus higher than that of the matrix. Inclusion‐initiated fracture is modeled for a spherical inclusion using a weight function method to compute the residual stress intensity factor for a part‐through elliptical crack. The results are applied to an α‐Al 2 O 3 inclusion embedded in a tetragonal ZrO 2 ceramic. The strength predictions agree well with experimental data.