多粒子有限要素法を用いた粉体圧縮成形プロセスと成形体の圧壊強度試験の数値解析

抄録

In this study, basic research was conducted to develop numerical models for filling behavior, compaction process, and tensile test of compacts. Numerical calculations of the filling behavior using distinct element method were performed. The calculated results got a good agreement with experimental one, enabling us to perform the numerical analysis of the filling process. The powder compaction process was also performed using multi particle finite element method (MP-FEM) with the information on the particle position and radius obtained from the DEM calculations. The compaction pressures of the same order as the experimental results were obtained, suggesting that the powder compaction process was successfully analyzed numerically. Furthermore, using the compact geometry obtained from the compaction calculations, tensile tests were numerically calculated using the MP-FEM when a load was applied in the radial direction of the compact. The crushing process of the powder layer was successfully represented. It was shown that the tensile strength can be calculated from the numerical analysis. The particle filling behavior using DEM and the compaction and crushing processes using MP-FEM were successfully calculated numerically in a series.