Spherical shock-wave propagation in three-dimensional granular packings.
1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China. xuekun@bit.edu.cn
Summary
We numerically simulated shock wave propagation in granular materials. A serrated wave substructure correlated with particle layering and competing energy transfer mechanisms was observed, explaining nonlinear wave behavior.
Area of Science:
- Physics
- Materials Science
- Applied Mathematics
Background:
- Spherical shock wave propagation in granular media is complex.
- Understanding energy transmission in dense granular packing is crucial.
Purpose of the Study:
- To numerically investigate spherical shock wave propagation in dense granular packing.
- To correlate geometrical fabric with wave propagation properties.
- To elucidate the mechanisms behind nonlinear wave behavior.
Main Methods:
- Numerical simulations of spherical shock wave propagation.
- Analysis of temporal and spatial variations in wave properties.
- Examination of particle packing structure and contact force networks.
Main Results:
- A consistent serrated wave substructure with particle-scale characteristic lengths was identified.
- Interface-induced particle layering near the intruder coincided with the wave profile.
- Competition between two distinct energy transmission mechanisms explained nonlinear propagation.
- Anisotropic stress transmission arose from localized packing structures.
Conclusions:
- Particle layering and competing energy transfer mechanisms are key to nonlinear shock wave propagation in granular materials.
- The study highlights the interplay between packing geometry and wave dynamics.
- Findings offer insights into energy dissipation and transport in granular systems.
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