Mechanical Behavior of Nanostructured Materials at High Strain Rates. Computer Simulation

In this paper, we present the new model of mechanical behavior of nanostructural materials (NsM) and nanocrystalline materials (NM) in wide range of strain rates. The model was used for computer simulation of shock wave dynamics in NsM $\alpha $-Ti, Al, Cu, Ìg and NM Al$_{2}$O$_{3}$, ZrO$_{2}$-Y$_{2}$O$_{3}$ ceramics. The inelastic strain causes by the deformation mechanisms at micro- and meso- scale levels. The results testify to distinctions of the mechanical behavior nanostructural and a course-grained ceramic materials and a metal alloys at shock wave loading. The model predicts that the shear stress of NM and NsM at high strain rates is less than ones of course-grained materials due to contributions to inelastic deformation of the grain boundary sliding.