基于离散体的有限元法对粉末颗粒压制过程进行了细观数值模拟,考察了典型位置颗粒的应变过程、不同位置颗粒的变形差异以及颗粒在不同压制力下的应变情况。分析表明,压制过程中粉末颗粒的变形主要分为小变形初级阶段、应变剧烈的主变形阶段和应变趋于稳定阶段,模壁界面摩擦对于模壁区域颗粒的变形和压制密度有显著影响,增加压坯压制力并不能无限的提高压坯密度。 Based on the discrete finite element method, the microscopic numerical simulation of the powder particle pressing process was carried out. The strain process of the typical particles, the deformation of the particles at different positions and the strain of the particles under different pressing forces were investigated. The analysis shows that the deformation of the powder particles during the pressing process is mainly divided into the primary deformation stage, the main deformation stage and the strain tends to be stable. The friction at the mold wall interface has significant influence on the deformation and the compact density of the mold wall, Compaction pressure and can not be unlimited to improve the green density.