Abstract:
Numerical modeling of impact interaction between a non-deformable conical body and a porous layer has been performed. The porous layer is represented as an assembly of discrete elements, whose motion and deformation are described using a mesh-free discrete element method (DEM). This approach interprets elements as particles with defined elastic properties, enabling effective simulation of processes involving large displacements and material discontinuity, unlike conventional mesh-based methods. The fundamental principles of DEM, which has gained widespread adoption due to advances in computational technologies, are presented. The numerical model and calculation methodology are described in detail. Simulation results are presented for normal high-velocity interaction between a deformable porous medium (composed of particles) and an elastic rod with a conical contact surface. Coulomb friction at the interface between the porous medium and conical surface is accounted for. The contact forces exerted by the discrete medium on the elastic conical body are evaluated. The numerical results are compared with experimental data obtained from reverse ballistic experiments where a container with porous material is projected against a stationary rod at various initial velocities.
Keywords:discrete element method, numerical modeling, experiment, three-dimensional problem, large displacements, impact, penetration, granular layer, friction
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