Premium
Constitutive Model for Cold Compaction of Ceramic Powder
Author(s) -
Kim Hyoung Seop,
Oh SungTag,
Lee JaiSung
Publication year - 2002
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.1151-2916.2002.tb00422.x
Subject(s) - ceramic , compaction , constitutive equation , materials science , silicon nitride , composite material , porosity , polynomial , deformation (meteorology) , thermodynamics , finite element method , mathematics , mathematical analysis , physics , layer (electronics)
Densification behavior of ceramic powder by pressure at room temperature was investigated using the constitutive equation based on plastic deformation theory for porous materials (the Lee‐Kim model). The modified Lee‐Kim constitutive model with two parameters is compared with the Shima model (four parameters) and the Cam‐Clay model (three parameters and one polynomial equation). The calculated yield loci using the modified Lee‐Kim model were compared with the experimental and calculated data for silicon nitride (Si 3 N 4 ) powder. Contrary to the conclusion of some previous researchers, all three models simulate densification behavior of ceramic powder reasonably well.