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- W1554885454 abstract "A microstructure-related viscoplastic constitutive model based on dislocation densities treated as internal variables is used as a frame for a gradient plasticity model. Two different spatial coupling mechanisms giving rise to higher order gradient terms are considered. These mechanisms involve (i) elastic stresses to compensate for plastic incompatibilities between material elements and (ii) direct mobile dislocation exchange. From a discrete formulation in the nearest neighbour approximation a continuum version of the model is obtained. The competing (stabilising vs. destabilising) effects of the two kinds of gradient terms warrant the well-posedness of the problem. The model (which has been successful in describing spatially uniform plastic deformation) is now proposed as a basis for analysing spatially non-uniform plastic deformation when higher gradient terms come into play." @default.
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- W1554885454 date "1996-01-01" @default.
- W1554885454 modified "2023-09-27" @default.
- W1554885454 title "From Micro- to Macroscale: Gradient Models of Plasticity" @default.
- W1554885454 hasPublicationYear "1996" @default.
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