DETERMINING THE RHEOLOGICAL CHARACTERISTICS AND MODELING THE EXTRUSION OF POWDER AND POROUS MATERIALS.  PART 2. POROUS BODY

The paper investigates the plastic deformation processes in metal materials using the numerical methods, in particular, the finite-element method. The calculation and experimental technique developed for determining the rheological characteristics of a porous material is performed according to the well-known mechanical characteristics of the material’s particles on the basis of analyzing the deformation of an idealized model of a porous body. We have considered an idealized model of the porous body, based on which we simulated the deformation process of a representative elementary cell shaped as 1/8th of a cube with a spherical pore. The simulation results are in good agreement with the experimental data on the pressing of the AKB-2.5 porous material. This means it is possible to use the developed calculation and experimental technique for determining the rheological characteristics of a porous body from the known yield point values of the particle material for simulating the consolidation processes of porous materials.