颗粒系统力学性质的历史相关性
History dependence of mechanical properties in granular systems
摘要：
通过数值模拟研究了颗粒介质力学性质的历史相关性。我们进行了压缩的摩擦盘填料在一个二维系统中，通过控制域的面积与各种应变率。然后，我们发现应变率依赖的临界包装分数以上的压力变得有限。所观察到的行为，使一个对比与良好的研究无摩擦盘填料的堵塞过渡。我们还观察到，圆盘填料的弹性常数依赖于应变率的几何。这一结果为颗粒系统的历史依赖性提供了实验检验。
英文摘要：
We study the history dependence of the mechanical properties of granular media by numerical simulations. We perform a compaction of frictional disk packings in a two-dimensional system by controlling the area of the domain with various strain rates. We then find the strain rate dependence of the critical packing fraction above which the pressure becomes finite. The observed behavior makes a contrast with the well-studied jamming transitions for frictionless disk packings. We also observe that the elastic constants of the disk packings depend on the strain rate logarithmically. This result provides a experimental test for the history dependence of granular systems.
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