The behavior of model granular materials (glass beads) wetted by a small quantity of liquid forming capillary bridges is studied by one-dimensional compression test combined with X-ray computed tomography (XRCT) observation. Special attention is paid to obtain very loose initial states (initial void ratio of about 2.30) stabilized by capillary cohesion. XRCT-based analyses involve spherical particle detection adapted to relatively low-resolution images, which enable heterogeneities to be visualized and microstructural information to be collected. This study on an ideal material provides an insight into the macroscopic compression behavior of wet granular materials based on the microstructural change, such as pore distance distribution, coordination number of contacts, coordination number of neighbors and number of contacts per grain.

中文翻译：

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疏松湿颗粒材料的晶粒尺度压缩行为的实验研究

通过一维压缩试验结合X射线计算机断层扫描（XRCT）观察，研究了由少量液体形成的毛细管桥润湿的模型颗粒材料（玻璃珠）的行为。要特别注意获得通过毛细管内聚作用稳定的非常松散的初始状态（初始空隙比约为2.30）。基于XRCT的分析涉及适用于相对较低分辨率的图像的球形粒子检测，这可以使异质性可视化并收集微结构信息。这项对理想材料的研究基于微结构变化，例如孔距分布，接触点的配位数，邻居的配位数和每个晶粒的接触数，提供了对湿颗粒材料宏观压缩行为的了解。