接触力
粒状材料
材料科学
数字图像相关
颗粒(地质)
机械
偏转(物理)
变形(气象学)
离散元法
复合材料
经典力学
物理
作者
Fanxiu Chen,Yuxin Liu,Yuan Wang,Ye Gu,Yongfu Yu,Jie Sun
出处
期刊:Materials
[MDPI AG]
日期:2023-08-03
卷期号:16 (15): 5441-5441
被引量:1
摘要
A continuous loading experiment of a two-dimensional granular system was carried out and the experimental data were obtained by digital image correlation (DIC). The deformation field of the granular system and the changing laws of the deflection angle and coordination number of the granules on force chains with time were obtained. Based on the granule element method, the quantitative calculation of contact force was realized, and the internal force chains of the granular system were identified. The effects of contact force between granules and mechanical parameters on the evolution of force chains in a two-dimensional granular system under line loads were analyzed. The formation, evolution, and reconstruction of force chains in a granular system during loading, as well as the influence of the force chain network evolution on the macroscopic mechanical properties of granules were discussed. The experimental results indicated that the evolution of force chains was directly related to the number, geometric properties, and permutation distribution of granules in direct contact with the external load.
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