Abstract Fabrics of granular media play an important role in understanding sophisticated soil behaviors and developing constitutive models. In this study, the evolution of fabric anisotropy in terms of both contact normals and local void distributions under drained and undrained loading conditions is explored using DEM simulations. It is observed that the anisotropy degree of both contact-based and void-based fabric increases when granular packing is subjected to monotonic loading. However, the mobilization of the contact-based fabric is much faster than that of the void-based fabric. The contact-based fabric is significantly influenced by static liquefaction, while the influence of static liquefaction on the void-based fabric is almost negligible. Furthermore, one of the descriptors by which to quantify the void-based fabric, Ed, has a strong correlation with the void ratio and mean effective stress. Various manifestations of dilative (or contractive) behaviors of granular soils can be further unified by the evolution of Ed.

中文翻译：

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颗粒介质的基于接触和基于空隙的织物之间的关系

摘要 颗粒介质的结构在理解复杂的土壤行为和开发本构模型方面发挥着重要作用。在这项研究中，使用 DEM 模拟探索了在排水和不排水载荷条件下，织物各向异性在接触法线和局部空隙分布方面的演变。观察到当颗粒填料受到单调载荷时，基于接触和基于空隙的织物的各向异性程度增加。然而，基于接触的织物的移动速度比基于空隙的织物快得多。接触型织物受静态液化的影响显着，而静态液化对空隙型织物的影响几乎可以忽略不计。此外，量化基于空隙的织物的描述符之一，Ed，与空隙率和平均有效应力有很强的相关性。Ed的演化可以进一步统一颗粒土膨胀（或收缩）行为的各种表现形式。