Dislocation jamming and Andrade creep

Details Dislocation jamming and Andrade creep Dislocation jamming and Andrade creep

2002-05-10

arxiv.org/abs/cond-mat/0205217v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 EPS figures

Scientific paper

We simulate the glide motion of an assembly of interacting dislocations under the action of an external shear stress and show that the associated plastic creep relaxation follows Andrade's law. Our results indicate that Andrade creep in plastically deforming crystals involves the correlated motion of dislocation structures near a dynamic transition separating a flowing from a jammed phase. Simulations in presence of dislocation multiplication and noise confirm the robustness of this finding and highlight the importance of metastable structure formation for the relaxation process.

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