摘要翻译:
我们对一个二维LJ玻璃在t=0的准静态剪切变形下进行了广泛的模拟。我们根据塑性不可逆事件和弹性可逆运动的贡献来分析非仿射位移的分布。由此,我们提取了关于塑性事件之间的相关性和关于弹性非仿射噪声的信息。此外,我们发现非仿射运动本质上是扩散的,具有明显的尺寸依赖的扩散常数。这些结果,再加上对非仿射切线位移场演化模式的仔细考察,使我们提出了在这种非晶介质中的塑性唯象学。它可以用弹性载荷和小的、随机位置的剪切转变区的不可逆翻转来表示,这些剪切转变区通过它们的四极场弹性耦合。
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英文标题:
《Plastic response of a 2D amorphous solid to quasi-static shear : I -
Transverse particle diffusion and phenomenology of dissipative events》
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作者:
Ana\"el Lema\^itre and Christiane Caroli
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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一级分类:Physics 物理学
二级分类:Disordered Systems and Neural Networks 无序系统与神经网络
分类描述:Glasses and spin glasses; properties of random, aperiodic and quasiperiodic systems; transport in disordered media; localization; phenomena mediated by defects and disorder; neural networks
眼镜和旋转眼镜;随机、非周期和准周期系统的性质;无序介质中的传输;本地化;由缺陷和无序介导的现象;神经网络
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英文摘要:
We perform extensive simulations of a 2D LJ glass subjected to quasi-static shear deformation at T=0. We analyze the distribution of non-affine displacements in terms of contributions of plastic, irreversible events, and elastic, reversible motions. From this, we extract information about correlations between plastic events and about the elastic non-affine noise. Moreover, we find that non-affine motion is essentially diffusive, with a clearly size-dependent diffusion constant. These results, supplemented by close inspection of the evolving patterns of the non-affine tangent displacement field, lead us to propose a phenomenology of plasticity in such amorphous media. It can be schematized in terms of elastic loading and irreversible flips of small, randomly located shear transformation zones, elastically coupled via their quadrupolar fields.
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PDF链接:
https://arxiv.org/pdf/705.0823