Simulation of the Microplasticity and the Mechanical Behavior of Porous Materials

A model is proposed to describe the mechanical behavior of structurally heterogeneous porous metallic materials, which are considered as a composite material or a three-component medium consisting of pores, an elastic part of the matrix, and microplasticity zones. The main attention is paid to the concentration of microplastic zones, which appear near pores during uniaxial tension. The influence of microplasticity on the effective loading diagram is considered for 07Kh18N12M2 steel samples of various porosities fabricated by layer-by-layer laser sintering of a powder. The calculation results are compared with the experimental data, and their satisfactory agreement is achieved.