中国农业大学学报2017，Vol.22Issue(11)：68-74,7.DOI:10.11841/j.issn.1007-4333.2017.11.07
基于拟土颗粒DEM数值模型的静态液桥力测试方法
Method of measuring the static liquid bridge force of soil particles based on DEM modeling
摘要
Abstract
In order to numerically predict tillage soil dynamics process,based on the relationship of liquid bridge force and gap width between two particles,a DEM model for wet particle system was set to investigate tillage soil dynamics.Based on Sartorius-microbalances two schemes,for the measurement of static liquid bridge force were proposed:The former was of manual measurement with an x-y-z manual adjustment slide and a digital microscope connected to a laptop,and the later was for automatic measurement with additional parts including a screw slide module driven by a stepping motor.Measurements were carried out for two equal spheres and unequal ones with both schemes,and the results were compared with available analytical equations or fitting ones.The results showed that the experimental set combined with the procedures enabled the evolution of static liquid bridge force with increment of separation and further determined the rupture distance with satisfactory.In conclusion,the approximate equation was suitable for modeling the static liquid bridge force of soil particles.关键词
土壤动力学/颗粒/离散元/液桥力/测试Key words
soil dynamics/particle/discrete element method/liquid bridge force/measurement分类
数理科学引用本文复制引用
余莲英,周丹洋,徐春晖,徐泳..基于拟土颗粒DEM数值模型的静态液桥力测试方法[J].中国农业大学学报,2017,22(11):68-74,7.基金项目
国家自然科学基金资助项目(11272341 （）
11072260) （）
