Finite-element simulation of multiaxial compaction of sponge titanium powder

Abstract

In this study, based on numerical simulation of multiaxial compaction process, an attempt is made to establish a consistent relation of material porosity to shearing and normal stresses under various stress state conditions. The finite element model of the multiaxial compression process has made it possible to apply both radial and axial pressures independently of one another. Powdered titanium sponge is modeled using the modified Drucker-Prager Cap plasticity model. A mathematical model of porosity alteration depending on the range of the equivalent pressure stress and the von Mises equivalent stress has been obtained. A comparison between finite-element simulation and experimental research on the die compaction of titanium sponge has been made. © 2016 Author(s).