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Modeling of Porous Ceramics Response to Compressive Loading
Author(s) -
Sadowski Tomasz,
Samborski Sylwester
Publication year - 2003
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.1151-2916.2003.tb03637.x
Subject(s) - materials science , ceramic , porosity , composite material , deformation (meteorology) , compression (physics) , crystallite , constitutive equation , grain boundary , porous medium , phase (matter) , dislocation , microstructure , structural engineering , metallurgy , finite element method , engineering , chemistry , organic chemistry
This paper deals with theoretical foundations of micromechanical constitutive modeling of porous polycrystalline ceramic materials under compression. The porosity of the material is assumed to be closed and distributed in grains and along grain boundaries. It strongly influences both material elastic features and microcrack growth. The deformation process includes elastic phase, dislocation band creation, and microcrack initiation, the crack‐development phase leading to crack kinking and finally to failure. As an example, the quasi‐static loading process of MgO ceramics is analyzed.