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Relationship of Surface Structure of Glass to Residual Laminar Stresses
Author(s) -
LEVENGOOD W. C.,
BUTLER E. B.
Publication year - 1953
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.1151-2916.1953.tb12878.x
Subject(s) - toughened glass , composite material , materials science , residual stress , stress (linguistics) , square (algebra) , square root , glue , optical glass , mathematics , geometry , philosophy , linguistics
The force necessary to detach a glass test block from a sample of tempered glass to which it is glued is shown to be linearly related to the stress in the tempered glass. Fine microscopic glue lines left on the tempered glass after detachment of the test block are suggested as Griffith cracks by comparison of the glue lines with the pattern made visible by treatment of tempered samples with sodium vapor. A linear relationship between the square root of the total crack length on a sample and the stress in the glass is demonstrated. The linear relationship between the square root of the crack length and stress is derived theoretically.