Determination of the ultimate plastic capacity for powder materials based on the plastic flow model for porous solids. II. Influence of porosity and the stress-strain properties of the solid phase on the ultimate plastic capacity of a porous sintered material

A procedure for theoretical construction of the limiting surface for porous materials is described. The procedure requires the porosity. the stress-strain properties of the solid phase, and decohesion to be predefined. The limiting surface is defined for proportional loading paths. The obtained limiting states are also represented as plasticity, diagrams. A satisfactory correspondence of the theoretical results with experimental data is shown for a number of both ferrous and non-ferrous powder materials.