Modelling of new generation structural material mechanically similar to biological structural materials

Abstract

The main stages of structural material (SM) modeling are considered. An analysis of propensity to stress concentration of the existing artificial and biological SMs allowed to formulate the main feature of the material, which gives it maximum strength and fracture resistance: the presence in its representative volume of shear mechanisms in one direction only. As a mechanical model of SM which simulate the biological SM was selected a bundle of hexagonally packed fibers with a predetermined boundaries cohesive strength. The fiber sections are almost regular hexagons. The modeling results include: 1 — the technology of the material obtaining by pressing of the bundle of fibers at their plastic deformation, 2 — the elastic characteristics of the bundle at the ideal contact of the fiber interfaces as the normalizing characteristics to assess the quality of the contacts in real materials, 3 — stress intensity factors for typical cracks 4 — the fracture and an inelastic shear at the fiber interface on either side of the crack in the fiber. Modelling was performed using the finite element method.