Reviewed are the results of numerical analysis for mesoscale deformation in three-dimensional polycrystals under quasistatic and dynamic loading. The three-dimensional models of polycrystalline microstructures are generated by the step-by-step packing method. The elastic-plastic response of grains is described taking into account the Hall-Petch relation, strain hardening and elastic anisotropy at the mesolevel. A double-limit yield criterion is proposed to describe the nucleation and development of plastic strains in the bulk of grain conglomerates. The role of the free surface and grain boundaries in the evolution of mesoscale deformation is analyzed. A special attention is paid to the analysis of surface relief evolution under uniaxial tension.
|Number of pages||18|
|Journal||International Journal of Terraspace Science and Engineering|
|Publication status||Published - 1 Dec 2010|
- Mesoscale stress-strain state
- Three-dimensional models
ASJC Scopus subject areas