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Edge‐Crack Resistance Curves in Supercritical Ceramics
Author(s) -
Stump David M.
Publication year - 1992
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.1151-2916.1992.tb04156.x
Subject(s) - materials science , enhanced data rates for gsm evolution , ceramic , toughening , supercritical fluid , indentation , composite material , fracture (geology) , crack growth resistance curve , fracture toughness , transformation (genetics) , cubic zirconia , fracture mechanics , stress (linguistics) , crack closure , toughness , thermodynamics , computer science , gene , telecommunications , biochemistry , chemistry , physics , linguistics , philosophy
The growth of edge cracks in zirconia‐reinforced ceramics is analyzed theoretically with the „supercritical” transformation model. The injection of an initial edge crack by a damage process is modeled in an approximate manner. Subsequent crack growth under the application of a remote tensiles stress models the evolution of the transformed region as the crack advances. For the range of initial crack sizes considered, „nominal” resistance curves depend strongly on a transformation‐toughening parameter. The analysis may have a bearing on the indentation/bend method of testing fracture toughnesses.