Modeling of the mechanical characteristics of copper-based powder materials under plastic forming to control porosity

Keywords

porous body, modeling, shape change, porosity models, pressure treatment, cold plastic deformation, flow curve, stress.

Cite as

Sivak R. I., Polishchuk L. K., and Gao Xianan. Modeling of the mechanical characteristics of copper-based powder materials under plastic forming to control porosity. Physicochemical Mechanics of Materials. 2025. 61(2), 023-030.

https://doi.org/10.15407/pcmm2025.02.023

Abstract

A method for modeling the mechanical characteristics of porous bodies by uniform func­tions is proposed. It is based on the basic principles of the mechanics of plastic deformation of porous bodies and enables obtaining reliable porosity models for the studied mate­rial by refining theoretical functions with experimental data obtained during axisymmetric pressing of cylindrical samples without friction at the ends. Based on the theoretical studies conducted, such models for copper-based materials were obtained. Samples of copper powder with different initial porosity were studied. As a result of experimental data processing, final expressions for porosity models of the copper powder workpiece material were obtained. A method for calculating the accumulated deformation of the base material was also developed. Flow curve for copper-based powder materials were built.

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