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Cyclic Fatigue Behavior of an Alumina Ceramic with Crack‐Resistance Characteristics
Author(s) -
Lathabai Srinivasarao,
YiuWing Mai,
Lawn Brian R.
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.tb06323.x
Subject(s) - materials science , indentation , ceramic , cyclic stress , tension (geology) , composite material , bridging (networking) , alumina ceramic , fracture mechanics , crack closure , compression (physics) , computer network , computer science
The behavior under cyclic tension—tension loading of an alumina ceramic with pronounced crack‐bridging (R‐curve) characteristics is studied. Tests on disk specimens with indentation cracks reveal no failures below the static fatigue limit. Theoretical predictions of the stress‐lifetime response, based on the premise that environmentally assisted slow crack growth is the sole factor determining lifetime, are consistent (within experimental scatter) with the data. The results indicate that there is no significant cyclic degradation from potential damage to the bridges, at least in the short‐crack region pertinent to strength properties.