材料工程Issue(7)：10-14,19,6.
粉末高速压制成形密度分布的数值模拟及影响因素分析
Numerical Simulation and Influential Factors Analysis of Density Distribution in High Velocity Compaction
摘要
Abstract
Discrete element method which is used for studying mechanical behaviors of discontinuance is applied to studying the process of powder densification in high velocity compaction. Considering the powder as viscoelastic discrete particles, the contact model of particle flow and the equation of motion of each particle are established, constitutive model of viscoelastic powder in high velocity compaction described by force-displacement is deduced in detail. Based on computing software PFC for discrete element method, the process of the two-dimensional particle flow and density distribution during high velocity compaction are simulated. The density distribution of numerical simulation results coincide well with experiments in engineering application. The factors which affect the density distribution including friction coefficient, height-diameter ratio and two-directional compaction are analyzed.关键词
高速压制/离散单元法/PFC/压坯密度分布Key words
high velocity compaction/distinct element method/PFC/density distribution分类
矿业与冶金引用本文复制引用
郑洲顺,徐丹,雷湘媛,应仁仁,周文,张梦轩..粉末高速压制成形密度分布的数值模拟及影响因素分析[J].材料工程,2012,(7):10-14,19,6.基金项目
国家自然科学基金(50874123,51174236) （50874123,51174236）
国家重点基础研究发展规划(2011CB606306) （2011CB606306）
国家大学生创新实验项目(LA09040) （LA09040）
中南大学优博扶植基金(2010YBFZ074) （2010YBFZ074）
中南大学研究生创新教育工程(2010ssxt115,2011ssxt139) （2010ssxt115,2011ssxt139）
