论文标题
多分散性对剪切下密集2D颗粒系统的塑性行为的影响
Effects of Polydispersity on the Plastic Behaviors of Dense 2D Granular Systems Under Shear
论文作者
论文摘要
我们研究了剪切的高度分散材料中的粒子尺度运动，其中最大的颗粒的大小是最小的十倍。我们发现与更常见的多分散性无定形系统的行为截然不同。特别是，对颗粒的非承包运动的分析揭示了大颗粒和小颗粒之间的质量差异：较小的颗粒在大颗粒的存在中引起了巨大的非承包运动。我们表征了从低流分离性制度的非承包运动中的交叉运动，并展示了一种定量方法，可以区分具有粒径较大分布的系统中的“大”和“小”粒子。
We study particle-scale motion in sheared highly polydisperse amorphous materials, in which the largest particles are as much as ten times the size of the smallest. We find strikingly different behavior from the more commonly studied amorphous systems with low polydispersity. In particular, analysis of the nonaffine motion of particles reveals qualitative differences between large and small particles: the smaller particles have dramatically more nonaffine motion, which is induced by the presence of the large particles. We characterize the crossover in nonaffine motion from the low- to high-polydispersity regime, and demonstrate a quantitative way to distinguish between "large" and "small" particles in systems with broad distributions of particle sizes.
