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Strength Variability of Indented Soda‐Lime Glass
Author(s) -
GLAESEMANN G. SCOTT,
JAKUS KARL,
RITTER JOHN E.
Publication year - 1987
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.1151-2916.1987.tb05665.x
Subject(s) - indentation , materials science , composite material , soda lime glass , fracture (geology) , fracture mechanics , surface (topology) , trace (psycholinguistics) , geometry , mathematics , linguistics , philosophy
Studies of annealed indentation flaws show that specimen strength is inversely proportional to the square root of the surface trace dimension of the strength‐controlling radial crack over a range of indentation loads. Using the surface trace as the characteristic dimension in the appropriate fracture mechanics equations, however, underestimates the measured strengths by about 30%. There is also a lack of correlation between the individual strengths and the surface traces at a given indentation load. Despite the complex nature of indentation flaws, strength predictions of individual indentation cracks based on the radial crack depth (not the surface trace) are in agreement with measured strengths. Strength variability of indented glass specimens at a given indentation load is due mainly to the spectrum of crack depths.