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Flaw‐Insensitive Ion‐Exchanged Glass: I, Theoretical Aspects
Author(s) -
Sglavo Vincenzo M.,
Larentis Luca,
Green David J.
Publication year - 2001
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.1151-2916.2001.tb00922.x
Subject(s) - residual stress , materials science , toughness , composite material , stress (linguistics) , range (aeronautics) , surface stress , surface (topology) , fracture toughness , forensic engineering , geometry , mathematics , surface energy , engineering , philosophy , linguistics
Stable crack growth can be produced on residually stressed surfaces, provided that the residual‐stress profile is carefully chosen. Once identified, these conditions will lead to strengthening and an insensitivity of strength to the size of the initial surface flaw. Theoretical calculations are performed that involve choosing idealized forms of either the required toughness curve or the residual‐stress profile. The results of this analysis allow the range of stable growth and the strengthening to be determined. Thus, in the material‐design process, if the range of surface flaws in the stress‐free surface are known, then the required stress profile or toughness curve for optimum performance can be selected.