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Equibiaxial Stress Effect on Fracture Strength of Indented Soda‐Lime Glass in Water Environment: An Examination for Dependence on Crack‐Tip Blunting
Author(s) -
Ikeda Kiyohiko,
Igaki Hisashi,
Tanigawa Yoshinobu,
Tagashira Koichiro
Publication year - 1990
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.1151-2916.1990.tb05280.x
Subject(s) - materials science , composite material , ultimate tensile strength , fracture (geology) , stress (linguistics) , soda lime , fracture mechanics , moisture , crack closure , philosophy , linguistics
Equibiaxial stress effects were observed in constant stressing rate tests of indented soda‐lime glass in a water environment. To discuss whether the equibiaxial stress effects on fracture strenght in a water environment were caused by the blunting of crack tips by chemical reaction between the glass and moisture, the specimens with controlled surface flaws soaked in hot water to make the crack tip blunt were fractured under both uniaxial and equibiaxial tensile stresses under both vacuum and air environments. The biaxial strengthening observed under restricted subcritical crack growth indicates that equibiaxial stress effects in a water environment are caused by the rounding of the initial crack tip.