Influence of liquid bridges on the mechanical behaviour of polydisperse granular materials
Influence of liquid bridges on the mechanical behaviour of polydisperse granular materials
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DOI：
10.1002/nag.476
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发表时间：
2006-03
影响因子：
4
通讯作者：
F. Soulié;F. Cherblanc;M. E. Youssoufi;C. Saix
中科院分区：
文献类型：
--
作者：
F. Soulié;F. Cherblanc;M. E. Youssoufi;C. Saix
我们研究了一种多分散颗粒材料，其中颗粒相互作用受毛细力定律支配。对于直径不等的颗粒对，内聚力表示为粒子间距离和液桥体积的显式函数。在标准物质上的实验验证了这一分析关系。然后，通过一个破裂准则来完成，并以力律的形式铸造，该力律考虑了固体接触、毛细力和晶粒对的破裂特性。最后，为了评估毛细黏聚对宏观行为的影响，采用三维离散元法模拟了湿颗粒圆柱组件的径向和轴向压缩试验。版权所有©2005 John Wiley & Sons， Ltd
We investigate a polydisperse granular material in which the particle interactions are governed by a capillary force law. The cohesion force for a grain‐pair with unequal diameters is expressed as an explicit function of the inter‐particle distance and the volume of the liquid bridge. This analytical relation is validated by experiments on a reference material. Then, it is completed by a rupture criterion and cast in the form of a force law that accounts for solid contact, capillary force and rupture characteristics of a grain‐pair. Finally, in order to evaluate the influence of capillary cohesion on the macroscopic behaviour, radial and axial compression tests on cylindrical assemblies of wet particles are simulated using a 3D distinct element method. Copyright © 2005 John Wiley & Sons, Ltd.