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Effect of Growth and Coalescence of Multisurface Cracks on Static Fatigue Behavior of Glass Ceramics
Author(s) -
Ikeda Kiyohiko,
Yoshikawa Akira,
Adachi Katsushige,
Kaizu Koichi,
Igaki Hisashi
Publication year - 1995
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.1151-2916.1995.tb07981.x
Subject(s) - indentation , coalescence (physics) , materials science , ceramic , brittleness , composite material , indentation hardness , microstructure , physics , astrobiology
In order to study the effect of the interaction and coalescence of multisurface cracks on the static fatigue behavior of brittle materials such as glass and ceramics, a single crack and three collinear cracks were introduced on the surfaces of plate specimens of glass ceramics by Vickers microhardness indentation and were subjected to a constant four‐point bending load. It was found that time‐to‐failure for a certain applied stress significantly decreased with the decrease in the crack center distance of indentation cracks, and the effect of interaction and coalescence of multicracks was shown to be significant. On the basis of the crack growth parameters for a single crack, time‐to‐failure for multicracks was predicted by taking the interaction and coalescence into consideration. It was demonstrated that the proposed multicrack coalescence model gives better predictions.