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Analysis of Indentation Crack as a Wedge‐Loaded Half‐Penny Crack
Author(s) -
Shetty Dinesh K.,
Rosenfield Alan R.,
Duckworth Winston
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.tb15288.x
Subject(s) - indentation , wedge (geometry) , materials science , composite material , crack tip opening displacement , fracture toughness , vickers hardness test , radius , fracture mechanics , crack closure , geometry , mathematics , microstructure , computer security , computer science
Surface cracks produced by indentation with a Vickers indenter were modeled as half‐penny cracks extended by symmetric disk‐shaped wedges. The wedge diameter was assumed to be equal to the hemispherical plastic zone size, and the wedge thickness was calculated by equating the wedge volume to the hardness‐impression volume. The resulting equilibrium relation between the indentation load and the radius of the half‐penny crack is in good quantitative agreement with similar relations obtained from fracture toughness calibration.