磁性材料の半溶融加工における結晶粒配向の個別要素法シミュレーション

概要

論文の詳細を見る
A method for simulating the motion of grains in mushy-state forming of magnets is proposed on the basis of the distinct element method. The grains of the magnet are modelled to be a lot of elliptical elements, and the effect of the liquid phase on the motion of the grains is treated as viscous resistance to the movement. The motion of individual grains is obtained by solving the equations of motion for a mail time step under the action of elastic repulsive, frictional and viscous forces. Plastic deformation of a metallic capsule containing the magnet is calculated by the viscoplastic finite element method, and the obtained motion of the interface between the capsule and the magnet is used as a boundary condition in the distinct element simulation. Mushy-state plane-strain upsetting of a rare earth magnet contained in a steel capsule is chosen as an example of the simulation. The calculated degree of grain alignment is in good agreement with that obtained by a model experiment using acrylic grains, a plasticine capsule and Vaseline.
一般社団法人日本機械学会の論文
1996-02-25