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多孔介质期刊
影响因子: 1.49 5年影响因子: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v13.i9.40
pages 807-823

CONSTITUTIVE MODELING FOR PLASTICITY OF METAL POWDERS DURING COMPACTION

Gholamreza Aryanpour
Department of Materials Engineering, Isfahan University of Technology, 84156 Isfahan, Iran
Masoud Farzaneh
CIGELE/INGIVRE, University of Québec at Chicoutimi, 555 Boulevard de l'Université, Chicoutimi, Québec G7H 2B1, Canada

ABSTRACT

In works dealing with the plastic behavior of metal powders, the material density or relative density has been a major isotropic hardening parameter. In this work, in a more realistic modeling, the equivalent plastic strain of the porous material, in addition to the relative density, is considered as an isotropic hardening parameter. Using an associated flow rule, the plastic deformation rate is derived and then, by fitting some experimental data obtained from hydrostatic compaction and simple compression tests on aluminum powder, the model parameters are identified for this powder. The identified model is finally verified by some other experimental results obtained from closed-die compaction tests. This last step also confirms that the model could take into account the powder characteristics via loose relative density.


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