模壁摩擦对粉末压制成形影响的细观模拟分析

iscrete element method is applied to mesoscopic simulate the loose particle flowing in the process of compaction. The strain processes and the deformation differences of the particles in typical position, the porosities change in different areas under various die wall friction coefficients were investigated. The results showed that die wall interface friction causes diagonal flow of particles from upper surface edges to the center of compact, it has a significant influence on deformation and pressed density uniformity of particles.