粉粒状体の三次元切削に関する研究

概要

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The granular media is deformed plastically by action of the cutting blade of the vehicle machinary: bulldozers, ploughs etc. It collapses on the slip surface, swells up and crumbles down in front of the blade. As this process is affected considerably by the shape of the blade, it is important to investigate the three dimensional deformation of the media. It is not easy, however, to estimate the deformation experimentally and analytically. In this paper, a visualization technique of flow with the aid of the glass osmotic method is introduced to investigate the behavior of the media in front of the blade. It is shown that the slip surface developed by the rectangular blade moving symmetrically in the non-cohesive media can be represented by the three planes: two vertical planes generated by the side edges and a plane expanding forwards from the bottom edge. On the basis of these results, the three dimensional wedge theory is derived to calculate the force acting on the blade. It is shown that the drag and lift coefficients depend upon the aspect ratio of the blade, and that the analytical data provide a good fit to the experimental data.
一般社団法人日本機械学会の論文
1985-07-25