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Modeling the Porosity Evolution of a Powder under Uniaxial Compression
Author(s) -
Lamy Peggy,
Brunet Luc,
Thomas Gérard
Publication year - 2005
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.200500031
Subject(s) - porosity , materials science , compression (physics) , composite material , fragmentation (computing) , population , deformation (meteorology) , particle (ecology) , mechanics , computer science , geology , physics , oceanography , demography , sociology , operating system
The purpose of this work is to present a new model describing the evolution of powder porosity versus applied pressure during uniaxial compression. This model is based on quasi‐chemical treatments and population balances. It is generally admitted that compression is composed of four steps: a first reorganization of the initial particles, a fragmentation of some initial particles, a second rearrangement of the initial and secondary particle mixture and a plastic deformation stage. So the model is constructed around these four steps. Experimental results on eighteen different powders show a fair agreement with theoretical results and material physical constant values. The use of this model can allow classifying the reorganization, fragmentation and plastic deformation abilities of the products and it will be useful in order to optimize the elaboration process.