论文标题
粘性磁盘包装的弹性
Elasticity of Jammed Packings of Sticky Disks
论文作者
论文摘要
许多软材料将高包装部分的无定形固体塞入。在模型系统的背景下,最好理解这种非平衡相变,在该模型系统中,当粒子重叠时弹性驱动。然而,最近表明,引入粒子之间的任何有限吸引力改变了过渡的通用类别。这个新的``粘性干扰''类的属性几乎完全没有探索。我们使用分子动力学模拟和缩放分析来确定剪切模量,散装模量以及接近粘性干扰点的边缘固体的配位。在每种情况下,系统的行为都急剧又与纯粹的排斥案例不同。
Numerous soft materials jam into an amorphous solid at high packing fraction. This non-equilibrium phase transition is best understood in the context of a model system in which particles repel elastically when they overlap. Recently, however, it was shown that introducing any finite amount of attraction between particles changes the universality class of the transition. The properties of this new ``sticky jamming'' class remain almost entirely unexplored. We use molecular dynamics simulations and scaling analysis to determine the shear modulus, bulk modulus, and coordination of marginal solids close to the sticky jamming point. In each case, the behavior of the system departs sharply and qualitatively from the purely repulsive case.