Porosity dependence of strength in brittle solids

摘要: Abstract The effect of pore size and volume fraction on strength in brittle solids is evaluated. analysis considers that the degradaton a solid containing large number spherical pores due to strong porosity Young's modulus. Each assumed possess radial or annular flaws emanating from surface whose lengths are considered be independent size. stress concentration induced by presence included equation for through modulus dependence originally developed using concept crack opening displacement. It shown controlled size, fracton (or annular) ratio. Predicted variation with tested against experimental data glass polycrystalline alumina.