Record number :
Title of article :
A multiscale model of plasticity
Author/Authors :
S. Akarapu · Hussein M. Zbib، نويسنده , , Tomas Diaz de la Rubia، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Pages :
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Abstract :
A framework for investigating size-dependent small-scale plasticity phenomena and related material instabilities at various length scales ranging from the nano-microscale to the mesoscale is presented. The model is based on fundamental physical laws that govern dislocation motion and their interaction with various defects and interfaces. Particularly, the multi-scale framework merges two scales, the nano-microscale where plasticity is determined by explicit three-dimensional dislocation dynamics analysis providing the material length-scale, and the continuum scale where energy transport is based on basic continuum mechanics laws. The result is a hybrid elasto-viscoplastic simulation model coupling discrete dislocation dynamics with finite element analyses. With this hybrid approach, one can address complex size-dependent problems including, dislocation boundaries, dislocations in heterogeneous structures, dislocation interaction with interfaces and associated shape changes and lattice rotations, as well as deformation in nano-structured materials, localized deformation and shear bands.
Keywords :
A. Dislocations , Dynamics , B. Elastic-viscoplastic materials
Journal title :
International Journal of Plasticity
Link To Document :