粉体粒度对松装粉体孔隙度影响的计算机模拟研究  

THE RESEARCH FOR THE INFLUENCE OF PARTICLE SIZE ON LOOSE POWDER POROSITY WITH COMPUTER SUMULATION TECHNOLOGY

作　　者：李君强[1] 陈文革[1] 陶文俊[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《粉末冶金工业》2011年第5期66-69,共4页Powder Metallurgy Industry

摘　　要：本文应用离散元分析法(DEM),综合分析粉体颗粒受到的重力、分子力、接触力、摩擦力等多种力的作用,建立松装粉体颗粒的数学模型。使用计算机模拟技术对粉体颗粒的堆积过程进行仿真。利用回归分析得到堆积松装粉体孔隙度随着粉体颗粒粒径的减小而逐渐增大的关系。并对比分析了计算机仿真与实际验证实验的共同点和差异产生的原因,提出了可能的解决方案。Mathematical model of the loose powders is established on comprehensively analyzing the gravity,molecular force,contact force and friction force which effect on very single powder particle by Distinct Element Method（DEM）.Accumulation process of powder particles is simulated by computer simulation technology（CST）.Relation between the loosing packing porosity and powder particle size is gained from regression analysis（RA）.Result shows porosity of loosing packing powders increases with the decrease of particle size.Results differences between computer simulation and verification experiment is discussed,and solutions for reducing the differences are proposed.

关 键 词：松装孔隙度 离散元分析法 数学模型 计算机模拟 

分 类 号：TB383.3[一般工业技术—材料科学与工程]