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Interaction and Multiscale Mechanics
  Volume 2, Number 1, March 2009, pages 1-14
open access

Interaction fields based on incompatibility tensor in field theory of plasticity-Part I: Theory-
Tadashi Hasebe

    This paper proposes an interaction field concept based on the field theory of plasticity. Relative deformation between two arbitrary scales, e.g., macro and micro fields, is defined which can be implemented in the crystal plasticity-based constitutive framework. Differential geometrical quantities responsible for describing dislocations and defects in the interaction field are obtained, based on which dislocation density and incompatibility tensors are further derived. It is shown that the explicit interaction exists in the curvature or incompatibility tensor field, whereas no interaction in the torsion or dislocation density tensor field. General expressions of the interaction fields over multiple scales with more than three scale levels are derived and implemented into the present constitutive equation.
Key Words
    multiscale modeling; crystal plasticity; field theory; differential geometry; non-Riemannian plasticity.
Tadashi Hasebe; Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan

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