Premium
Effect of Micromechanical Stress Cocentrations on Strength of Porous Glass
Author(s) -
BERTOLOTTI RAYMOND L.,
FULRATH RICHARD M.
Publication year - 1967
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.1151-2916.1967.tb14998.x
Subject(s) - materials science , composite material , porosity , volume fraction , stress (linguistics) , volume (thermodynamics) , classification of discontinuities , pressing , thermodynamics , mathematical analysis , philosophy , linguistics , physics , mathematics
The effect of micromechanical stress concentrations around elastic discontinuities in a glass was investigated. Specimens of glass containing porosity of controlled size and volume fraction were fabricated by vacuum hot‐pressing and strength was tested under uniaxial and biaxial stress conditions. Results were interpreted as a function of the relative sizes of Griffith flaws and the volume of material over which stress concentrations act. For the glass investigated, assuming an adequate flaw density, the strength was dependent on pore size and volume fraction as well as on the loading conditions. It is suggested that differences in uniaxial and biaxial strength are due to differences in stress concentration geometry.