粉体層の圧縮過程の解析
スポンサーリンク
概要
- 論文の詳細を見る
Hereunder is presented the report of investigation of the process of compressing powder bed. A method to analyze the stress-strain curves obtained at upper and lower punch was introduced in the compressional process. Pile of thin homogeneous layers was assumed for the powder bed, and so the exponential strain distribution in it also. The calculated results contain a stress-strain curve for thin homogeneous layer and heterogeneity index (H.I.) which represents the difference of strain between the layers.The applicability of the analytic method was shown to be reasonable. The calculated results of stress-strain curves for various powders coincide with the curves experimentally obtained for the thin bed after the repeated compression. The calculated stress distribution in the powder bed agreed well with the estimated values.The change of H.I. with stress is characteristic of the powder used and has its maximum plateau. The shape of H.I. change was similar to that of stress-relaxation rate for corn starch, and similar to that of Janssens constant for sucrose.
- 社団法人 日本材料学会の論文