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Fracture Stress as Related to Flaw and Fracture Mirror Sizes
Author(s) -
BANSAL GIRRAJ K.,
DUCKWORTH WINSTON H.
Publication year - 1977
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.1151-2916.1977.tb15547.x
Subject(s) - dimensionless quantity , fracture (geology) , materials science , ceramic , composite material , stress intensity factor , constant (computer programming) , crystallite , stress (linguistics) , fracture mechanics , metallurgy , mechanics , physics , linguistics , philosophy , computer science , programming language
Fractographically observed critical‐flaw boundaries in strength‐tested specimens of 2 polycrystalline ceramics were used in calculating critical stress‐intensity factors ( K IC )‐ Each ceramic exhibited a K IC which had little or no dependence on critical‐flaw characteristics and which agreed with the value obtained from independent determinations on artificially precracked specimens. Analyses both of fracture‐mirror sizes and of water‐enhanced subcritical crack growth data supported the evidence that K 1C is a material constant. The fracture‐mirror analysis further indicated that the parameter A/K IC , where A is the fracture‐mirror constant, is a dimensionless, material‐independent constant.