An extremal model for amorphous media plasticity
无序系统与神经网络
2009-11-07 v1 材料科学
摘要
An extremal model for the plasticity of amorphous materials is studied in a simple two-dimensional anti-plane geometry. The steady-state is analyzed through numerical simulations. Long-range spatial and temporal correlations in local slip events are shown to develop, leading to non-trivial and highly anisotropic scaling laws. In particular, the plastic strain is shown to statistically concentrate over a region which tends to align perpendicular to the displacement gradient. By construction, the model can be seen as giving rise to a depinning transition, the threshold of which (i.e. the macroscopic yield stress) also reveal scaling properties reflecting the localization of the activity.
引用
@article{arxiv.cond-mat/0206523,
title = {An extremal model for amorphous media plasticity},
author = {Jean-Christophe Baret and Damien Vandembroucq and Stephane Roux},
journal= {arXiv preprint arXiv:cond-mat/0206523},
year = {2009}
}
备注
4 pages, 5 figures