A quasi-unidimensional granular chain to attenuate impact
L P Machado1, A Rosas, K Lindenberg
1Núcleo de Desevolvimento Amazônico em Engenharia, NDAE, Universidade Federal do Pará, Caixa Postal 479, 68464-000, Tucuruı, PA, Brazil.
The European Physical Journal. E, Soft Matter
|November 23, 2014
Summary
This study introduces a novel granular chain design with auxiliary side grains that significantly improves impact attenuation. This configuration effectively traps energy and momentum, nearly eliminating impacts even in short chains.
Area of Science:
- Physics
- Materials Science
- Mechanical Engineering
Background:
- Granular chains are used for energy dissipation.
- Forward-tapered chains offer improved wave propagation characteristics.
- The need for enhanced impact mitigation in granular systems.
Purpose of the Study:
- To investigate a novel granular chain configuration for optimized impact attenuation.
- To explore the effect of auxiliary decorating grains on energy and momentum transfer.
- To assess the feasibility of constructing and utilizing such chains experimentally.
Main Methods:
- Numerical simulations of granular chain dynamics.
- Analysis of energy and linear momentum propagation.
- Geometric progression for main chain radii and increasing radii for auxiliary grains.
Main Results:
- The decorated granular chain configuration significantly enhances impact attenuation.
- Auxiliary grains effectively trap a portion of the propagating pulse's energy and momentum.
- The design naturally aligns the chain, simplifying experimental setup.
- Complete impact mitigation is achievable even with short chains.
Conclusions:
- The novel decorated granular chain design offers superior impact mitigation capabilities.
- This configuration presents a promising approach for developing advanced energy absorption systems.
- The findings facilitate the practical implementation of these granular chains in various applications.
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