Self-organization and memory in a cyclically driven elasto-plastic model of an amorphous solid

Dheeraj Kumar, Muhittin Mungan, Sylvain Patinet, Damien Vandembroucq
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引用次数: 0

Abstract

The mechanical behavior of disordered materials such as dense suspensions, glasses or granular materials depends on their thermal and mechanical past. Here we report the memory behavior of a quenched mesoscopic elasto-plastic (QMEP) model. After prior oscillatory training, a simple read-out protocol gives access to both the training protocol's amplitude and the last shear direction. The memory of direction emerges from the development of a mechanical polarization during training. The analysis of sample-to-sample fluctuations gives direct access to the irreversibility transition. Despite the quadrupolar nature of the elastic interactions in amorphous solids, a behavior close to Return Point Memory (RPM) is observed. The quasi RPM property is used to build a simple Preisach-like model of directional memory.
无定形固体循环驱动弹塑性模型中的自组织和记忆
无序材料(如致密悬浮液、玻璃或颗粒材料)的机械行为取决于它们的热和机械过去。在此,我们报告了淬火介观弹塑性(QMEP)模型的记忆行为。经过事先的振荡训练后,一个简单的读出协议就能获得训练协议的振幅和最后的方向。方向记忆来自于训练过程中机械极化的发展。对样本间波动的分析可直接获取不可逆转换。尽管无定形固体中的弹性相互作用具有四重性质,但仍可观察到接近于回转点记忆(RPM)的行为。利用准 RPM 特性建立了一个简单的类似普雷萨赫的定向记忆模型。
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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