Correlation mechanism between force chains and friction mechanism during powder compaction  

作　　者：Ning Zhang Shuai Zhang Jian-Jun Tan Wei Zhang 张宁;张帅;谈健君;张炜(School of Mechanical&Automotive Engineering,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]School of Mechanical&Automotive Engineering,Fujian University of Technology,Fuzhou 350118,China

出　　处：《Chinese Physics B》2022年第2期423-433,共11页中国物理B（英文版）

基　　金：supported by the Natural Science Foundation of Fujian Province,China(Grant No.2020J01869);the Initial Scientific Research Fund in Fujian University of Technology,China(Grant No.GY-Z19123);the Fujian Provincial Science and Technology Guiding Project,China(Grant No.2017H0002)。

摘　　要：The relation between friction mechanism and force chains characteristics has not yet been fully studied in the powder metallurgy research area.In this work,a uniaxial compression discrete element model is established based on the compaction process of ferrous powder.Furthermore,the correlation mechanism between force chains and the friction mechanism during powder compaction is investigated.The simulation results reveal a strong correlation between the variation of the friction coefficient and the evolution of force chains.During the powder compaction,the friction coefficient would eventually tend to be stable,a feature which is also closely related to the slip ratio between particles.The side wall friction and the friction between particles would have an important effect on the direction of force chain growth in about one-third of the area near the side wall.The research results provide theoretical guidance for improving the densification process of the powder according to the force chain and friction.

关 键 词：powder compaction force chains granular matter discrete element method 

分 类 号：TF121[冶金工程—粉末冶金]