DEM/FEM simulation for impact response of binary granular target and projectile

Three-dimensional dynamic discrete element method (DEM) and finite element method (FEM) simulation using LS-DYNA were, respectively, applied to the randomly distributed binary granular material and to the cylindrical projectiles in order to clarify the effect of size distribution of target particles...

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Bibliographic Details
Published in:The European physical journal. ST, Special topics Special topics, 2018-09, Vol.227 (1-2), p.73-83
Main Authors: Takeda, Shinnosuke, Ogawa, Kinya, Tanigaki, Kenichi, Horikawa, Keitaro, Kobayashi, Hidetoshi
Format: Article
Language:English
Subjects:
Advances in the Characterization
Atomic
Classical and Continuum Physics
Computer simulation
Condensed Matter Physics
Discrete element method
Finite element method
Granular materials
Impact response
Impact velocity
Materials handling
Materials Science
Measurement Science and Instrumentation
Modeling and Simulation of Materials Subjected to High Strain Rates
Molecular
Optical and Plasma Physics
Packing density
Particle size
Particle size distribution
Penetration resistance
Physics
Physics and Astronomy
Projectiles
Regular Article
Stress propagation
Stress waves
Terminal ballistics
Wave propagation
Wave reflection
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Summary:Three-dimensional dynamic discrete element method (DEM) and finite element method (FEM) simulation using LS-DYNA were, respectively, applied to the randomly distributed binary granular material and to the cylindrical projectiles in order to clarify the effect of size distribution of target particles on the dynamic behaviour of low density granular material. It was found that the peak resistance force of projectile during penetration depends on the packing density of the granular materials and on the impact velocity of projectile. The change of resistance force was well understood in connection with the propagation and the reflection of stress wave in projectile. The variety of particle size almost did not affect the resistance force of projectile. Densified region in granular material was generated ahead of projectile after impact. The densified region propagated in the depth direction and its propagation speed depended on the packing density of target granular material and impact velocity of projectile. That is, projectile impact behaviours of granular materials can be uniformly handled by impact velocity and packing density of the granular material, not depending on the variety of the particle size.
ISSN:1951-6355
1951-6401
DOI:10.1140/epjst/e2018-00071-3