Abstract
The dynamic behavior of mono-sized aggregated particles with a dissimilar material layer subjected to projectile impact at velocities less than 10m/s was investigated numerically by the discrete element method. The aggregated particles consisted of nylon spheres and alumina ceramic spheres with a diameter of 6.36mm, arranged in a rectangular parallelepiped container. A nylon sphere on the top layer of the aggregated particles was struck vertically by a steel sphere. In particular, the effect of the position of the dissimilar material layer on the motion of nylon spheres and the contact forces between spheres after impact was discussed in detail.
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