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In Situ Cube‐Corner Indentation of Soda–Lime Glass and Fused Silica
Author(s) -
Morris Dylan J.,
Cook Robert F.
Publication year - 2004
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.1551-2916.2004.01494.x
Subject(s) - indentation , materials science , composite material , residual stress , fracture (geology) , soda lime , pyramid (geometry) , stress intensity factor , soda lime glass , fracture mechanics , optics , physics
Indentation fracture with a cube‐corner diamond pyramid on soda–lime silicate glass and fused silica is investigated during the entire indentation cycle in both silicone oil and ambient‐air environments. Radial cracks form immediately on loading in all cases. The two‐component, elastic‐contact + elastic‐plastic mismatch (residual) stress field model that has been used successfully to describe radial crack evolution at Vickers indentations fails to describe the fracture response with the cube‐corner. The amplitudes of both elastic‐contact and residual stress‐intensity factors as deduced from these cube‐corner experiments are up to a factor of 10 greater than have been previously observed.