Granular Matter ( IF 2.3 ) Pub Date : 2021-07-22 , DOI: 10.1007/s10035-021-01135-0 C.M. Wensrich 1 , E.H. Kisi 1 , V. Luzin 2 , A. Rawson 1 , O. Kirstein 3
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Results from an experiment involving the measurement of individual particle stresses in a two-dimensional mono-disperse assembly of 579 ball bearings are presented. Using a combination of neutron radiography and strain scanning techniques, the full bi-axial stress state was obtained for each particle from which the full contact force network could be established. The evolution of this network was examined over a series of five monotonically increasing loads. Significant levels of inhomogeneity were observed in the form of prominent force chains that showed complex interaction with regions of order and disorder within the assembly. A reduction in the level of inhomogeneity with increasing load was also observed.
Graphical Abstract
中文翻译：
二维颗粒组件中接触力网络的演变：使用中子衍射进行检查
展示了涉及测量 579 个球轴承的二维单分散组件中单个粒子应力的实验结果。使用中子射线照相术和应变扫描技术的组合，可以获得每个粒子的完整双轴应力状态，从中可以建立完整的接触力网络。在一系列五个单调增加的负载上检查了该网络的演变。以突出的力链的形式观察到显着水平的不均匀性，这些力链显示出与装配内有序和无序区域的复杂相互作用。还观察到随着负载增加，不均匀性水平降低。
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