Modelling of elastic properties of sintered porous materials

摘要: Models for prediction of the elastic characteristics natural and synthetic porous materials are re-examined new models introduced. First, Vavakin–Salganik (VS) model with isolated spherical pores is extended in order to take into account various statistical distributions pore sizes. It shown that predictions VS good agreement experimental data such as foamed titanium, glass sandstone. However, a considerable disagreement sintered from metal powders. The explained by presence merged open whose shapes cannot be well approximated spheres. Using theory geometrical probabilities, amount close enough overlap estimated, introduced where merging modelled corresponding ellipsoids. Another modification proposed pores. This based on classical Rabotnov–Kachanov approach damage accumulation loaded material. Finally, given above models, their combination compared experiments. A observed between combined available variety materials.