Dislocation jamming and Andrade creep
统计力学
2007-05-23 v1 材料科学
摘要
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.
引用
@article{arxiv.cond-mat/0205217,
title = {Dislocation jamming and Andrade creep},
author = {M. -Carmen Miguel and Alessandro Vespignani and Michael Zaiser and Stefano Zapperi},
journal= {arXiv preprint arXiv:cond-mat/0205217},
year = {2007}
}
备注
4 pages, 4 EPS figures