Discrete Element Method Simulation of the Restitutive Characteristics of a Steel Spherical Projectile from a Particulate Aggregation
Discrete Element Method Simulation of the Restitutive Characteristics of a Steel Spherical Projectile from a Particulate Aggregation
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颗粒聚集钢球弹丸恢复特性的离散元法模拟
DOI：
10.1299/jsmea.47.438
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Yuki Matsumoto
中科院分区：
文献类型：
--
作者：
M. Nishida;Koichi Tanaka;Yuki Matsumoto
采用离散元法（DEM）对弹丸撞击速度小于 16m/s 时单分散颗粒聚集体的动态行为进行了数值研究。颗粒聚集体由在长方体容器中规则且三维排列的单一尺寸尼龙球组成。钢球垂直撞击聚集颗粒顶层中心附近的一个或多个尼龙球。特别详细讨论了几种冲击条件对钢弹弹回弹速度的影响。结果发现，钢弹的回弹速度取决于尼龙球之间的横向间隙、钢弹的半径与尼龙球的半径之比以及钢弹的撞击位置。
The dynamic behavior of monodispersed particulate aggregation subjected to projectile impact at velocities less than 16m/s is investigated numerically by the discrete element method (DEM). The particulate aggregation consists of mono-size nylon spheres arranged regularly and three-dimensionally in a rectangular parallelepiped container. A steel sphere vertically strikes a nylon sphere or several nylon spheres near the center in the top layer of aggregated particles. In particular, the effects of several impact conditions on the rebound velocity of the steel projectile are discussed in detail. As a result, it is found that the rebound velocity of the steel projectile depends upon the lateral gap between nylon spheres, the ratio of the radius of the steel projectile to the radius of nylon spheres and the impact position of the steel projectile.