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Valid K IC Determination via In‐Test Subcritical Precracking of Chevron‐Notched Bend Bars
Author(s) -
Sung Jason,
Nicholson Patrick S.
Publication year - 1989
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.1151-2916.1989.tb06264.x
Subject(s) - chevron (anatomy) , materials science , yttria stabilized zirconia , cubic zirconia , ceramic , ideal (ethics) , bar (unit) , composite material , geology , paleontology , philosophy , epistemology , oceanography
The initiation of the crack in a chevronnotched bend bar was studied. Ideal testing conditions depend strongly on specimen preparation and material; valid K IC values do not always result. An in‐test precracking technique was developed for ceramics at room and elevated temperatures. A yttria‐partially‐stabilized zirconia ceramic was tested, and the results showed that ideal testing conditions were obtained, which guaranteed valid K IC determination.