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Crack Branching in Ceramic Disks Subjected to Biaxial Flexure
Author(s) -
Shetty D. K.,
Rosenfield A. R.,
Duckworth W. H.
Publication year - 1983
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.1151-2916.1983.tb09978.x
Subject(s) - materials science , composite material , ceramic , branching (polymer chemistry) , crystallite , soda lime glass , stress intensity factor , fracture mechanics , metallurgy
Fracture stresses in soda‐lime glass, a glass‐ceramic, and an alumina ceramic tested in biaxial flexure correlated with the crack lengths prior to branching. The resultant branching constant for the glass agreed closely with the mirror‐mist boundary constant, and evidence indicated agreement between the branching constants and the inner‐mirror boundary constants for the polycrystalline materials. The ratio of the branching constant to the critical stress intensity factor was much smaller for the polycrystalline materials than for the glass. The crack‐branching measurements also indicated the presence of a compressive residual stress as Sociated with the ground sufaces of the specimens.