Studies of the Effect of Microstructure on the Dynamic Behavior of Granular and Particulate Materials.

Abstract

Results are presented of a three year experimental and theoretical study dealing with wave propagation in particulate materials. The experimental program used dynamic photoelasticity, strain gages and fiber optic sensors to collect information on model granular materials. The theoretical program developed a numerical model using discrete element methods (DEM) to simulate the dynamic behavior of granular media. The general goal of the research program was to determine relationships between granular fabric and wave propagational characteristics. DEM simulations on large two-dimensional systems with circular particles, investigated relationships of branch, wave and void vector fabric with wave speed and attenuation. Both experimental and numerical studies were conducted on model assemblies with elliptical particles.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1996
Accession Number
ADA322026

Entities

People

  • Arun Shukla
  • Martin H. Sadd

Organizations

  • University of Rhode Island

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Air Force
  • Civil Engineering
  • Computational Fluid Dynamics
  • Computational Science
  • Crystal Structure
  • Elastic Properties
  • Energy Transfer
  • Failure Mode And Effect Analysis
  • Geometry
  • Materials
  • Measurement
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanics
  • Physics Laboratories
  • Strain Gages
  • Wave Propagation

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computational Fluid Dynamics (CFD)
  • Reinforced Composite Materials