Premium
Knoop and Vickers Indentation in Ceramics Analyzed as a Three‐Dimensional Fracture
Author(s) -
KEER LEON M.,
FARRIS THOMAS N.,
LEE JUNGCHUAN
Publication year - 1986
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.1151-2916.1986.tb04766.x
Subject(s) - knoop hardness test , indentation , materials science , fracture (geology) , vickers hardness test , composite material , ceramic , indentation hardness , residual stress , microstructure
A three‐dimensional fracture analysis is applied to the Knoop and Vickers indentation fracture of ceramics. A brief discussion of the accuracy of the analysis applied to model the step load on the crack face caused by the residual stresses is given. A study is made of the effect of the elongated plastic zone in Knoop indentation on the unloaded radial fracture. It is shown that for small indentation loads the published experimental data can be verified by varying the depth reached by the semielliptical plastic zone with given surface length. An analysis and interpretation of the interaction between the two halfpenny‐shaped radial cracks induced by Vickers indentation is also given.