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Effect of Contact Residual Stress Relaxation on Fracture Strength of Indented Soda‐Lime Glass
Author(s) -
ROACH D. H.,
COOPER A. R.
Publication year - 1985
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.1151-2916.1985.tb16167.x
Subject(s) - indentation , materials science , residual stress , composite material , annealing (glass) , soda lime glass , stress relaxation , creep
The strength of Vickers‐indented soda‐lime glass measured in air at room temperature steadily increases with time after indentation, whereas optical retardation steadily decreases in the same interval. Annealing after indentation causes further strength increase and retardation decrease. The results are consistent with Marshall and Lawn's treatment of the slow crack growth of indentation flaws driven by the combined influence of residual contact stress and applied stress. Post‐indentation strengthening of indentation flaws can be explained without recourse to flaw blunting.