Coarse-graining amorphous plasticity: impact of rejuvenation and disorder

IF 1.3 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Comptes Rendus Physique Pub Date : 2022-08-30 DOI:10.5802/crphys.156

B. Tyukodi, Armand Barbot, Reinaldo Garci'a-Garci'a, Matthias Lerbinger, S. Patinet, D. Vandembroucq

引用次数: 0

Abstract

The coarse-graining of amorphous plasticity from the atomistic to the mesoscopic scale is studied in the framework of a simple scalar elasto-plastic model. Building on recent results obtained on the atomistic scale, we discuss the interest in a disordered landscape-informed threshold disorder to reproduce the physics of amorphous plasticity. We show that accounting for a rejuvenation scenario allows us to reproduce quasi-quantitatively the evolution of the mean local yield stress and the localization behavior. We emphasize the crucial role of two dimensionless parameters: the relative strength of the yield stress disorder with respect to the typical stress drops associated with a plastic rearrangement, and the age parameter characterizing the relative stability of the initial glass with respect to the rejuvenated glass that emerges upon shear deformation.

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粗晶非晶态塑性:再生与无序的影响

在一个简单的标量弹塑性模型的框架下，研究了从原子尺度到细观尺度的非晶塑性的粗粒化。基于最近在原子尺度上获得的结果，我们讨论了对无序景观知情阈值无序的兴趣，以再现无定形塑性的物理。我们表明，考虑到复兴情景，我们可以准定量地再现平均局部屈服应力和局部化行为的演变。我们强调了两个无量纲参数的关键作用：屈服应力无序相对于与塑性重排相关的典型应力降的相对强度，以及表征初始玻璃相对于剪切变形后出现的再生玻璃的相对稳定性的年龄参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Comptes Rendus Physique 物理-天文与天体物理

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

17.2 weeks

期刊介绍： The Comptes Rendus - Physique are an open acess and peer-reviewed electronic scientific journal publishing original research article. It is one of seven journals published by the Académie des sciences. Its objective is to enable researchers to quickly share their work with the international scientific community. The Comptes Rendus - Physique also publish journal articles, thematic issues and articles on the history of the Académie des sciences and its current scientific activity. From 2020 onwards, the journal''s policy is based on a diamond open access model: no fees are charged to authors to publish or to readers to access articles. Thus, articles are accessible immediately, free of charge and permanently after publication. The Comptes Rendus - Physique (8 issues per year) cover all fields of physics and astrophysics and propose dossiers. Thanks to this formula, readers of physics and astrophysics will find, in each issue, the presentation of a subject in particularly rapid development. The authors are chosen from among the most active researchers in the field and each file is coordinated by a guest editor, ensuring that the most recent and significant results are taken into account. In order to preserve the historical purpose of the Comptes Rendus, these issues also leave room for the usual notes and clarifications. The articles are written mainly in English.