Direct numerical simulation of polycrystals

Raul Radovitzky, Alberto Cuitino

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

We propose a computational strategy for incorporating microstructural features in the calculation of the effective response of polycrystals. These features include grain orientation, shape and distribution, grain interaction and grain-boundary constraint effects that arise as a consequence of the elastic and plastic-slip anisotropy of the lattice. The basic strategy is to explicitly account for the deformation of the individual grains and their interaction through the accurate (full-field) resolution of the local anisotropic elastic and plastic deformation fields inside each polycrystal grain. Single crystal plasticity models for FCC and BCC metals are employed in the calculations. We explore the feasibility of this simulation paradigm and its value in providing detailed information about microstructural features that develop as a result of the deformation in polycrystals. We demonstrate with specific examples of application that the type of strong inhomogeneities of plastic deformation inside the grains observed in experiments including localization of plastic deformation and intragrain misorientation can only be captured provided the calculations have enough resolution in the spatial discretization, which can only be achieved in applications of interest by recourse to large-scale parallel computing.

Original languageEnglish (US)
Pages (from-to)1920-1928
Number of pages9
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume3
DOIs
StatePublished - 2003
Event44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Norfolk, VA, United States
Duration: Apr 7 2003Apr 10 2003

All Science Journal Classification (ASJC) codes

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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