二次元配列された球状粒子集合体への球状飛しょう体の斜め衝突

概要

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The dynamic response of two-dimensional particulate aggregation subjected to the oblique impact of a spherical projectile less than 15 m/s are investigated experimentally and also numerically by using discrete element method. The particulate aggregation is modeled by the 329 nylon spheres arranged regularly and two-dimensionally in a rectangular container. When the damping coefficient between particles is assumed to be in proportion to the contact force between particles, the numerical simulations agree well with the results measured by a high-speed video camera. The asymmetrical behavior of the particulate aggregation is explained by the distribution of velocity vector of individual particle and normal direction component of contact force between particles. The scattering behavior of particulate aggregation depends on the impact position of particulate aggregation and incident angle of projectile. It is found that the normal direction component of contact force between the base plate and the lowest layer of particulate aggregation shows dynamic M-shaped distribution under impact point.
一般社団法人日本機械学会の論文
2003-02-25