论文标题
将剪切定位与颗粒材料中的远程相关的极化应力场联系起来
Connecting shear localization with the long-range correlated polarized stress fields in granular materials
论文作者
论文摘要
无定形固体中的一个持久难题是剪切定位，其中局部塑性变形涉及在几个粒子间距离的小区域的合作颗粒重排，自组织成剪切带，并最终导致材料故障。了解无定形固体的结构和动力学之间的联系对于物理，材料科学，岩土技术和土木工程以及地球物理学至关重要。在这里，我们显示了剪切定位与内部应力的固有结构之间的深厚联系，以剪切的植物堵塞的颗粒状材料。具体而言，我们发现微剪切带和两个极化应力场沿两个最大剪切的两个方向之间存在很强的（抗）相关性。通过探索张力网络的张力特征和旋转对称性，我们揭示了这种深刻的联系是剪切对称性破坏的结果。最后，我们提供了远距离相关的固有剪切应力的可靠实验证据。
One long-lasting puzzle in amorphous solids is shear localization, where local plastic deformation involves cooperative particle rearrangements in small regions of a few inter-particle distances, self-organizing into shear bands and eventually leading to the material failure. Understanding the connection between the structure and dynamics of amorphous solids is essential in physics, material sciences, geotechnical and civil engineering, and geophysics. Here we show a deep connection between shear localization and the intrinsic structures of internal stresses in an isotropically jammed granular material subject to shear. Specifically, we find strong (anti)correlations between the micro shear bands and two polarized stress fields along two directions of maximal shear. By exploring the tensorial characteristics and the rotational symmetry of force network, we reveal that such profound connection is a result of symmetry breaking by shear. Finally, we provide the solid experimental evidence of long-range correlated inherent shear stress in an isotropically jammed granular system.
